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RRB NTPC Mock Test - 10 (English)


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RRB NTPC Mock Test - 10 (English) for Railways 2022 is part of RRB NTPC Mock Tests Series preparation. The RRB NTPC Mock Test - 10 (English) questions and answers have been prepared according to the Railways exam syllabus.The RRB NTPC Mock Test - 10 (English) MCQs are made for Railways 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for RRB NTPC Mock Test - 10 (English) below.
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RRB NTPC Mock Test - 10 (English) - Question 1

Who among the following was the founder of The Indian National Army?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 1
  • Indian National Army was founded by Rash Behari Bose in 1942.
  • In July 1943 when Subhash Chandra Bose joined the INA, Rash Behari Bose handed over the leadership to him.
  • INA had two headquarters at Rangoon and Singapore.
  • INA had three fighting brigades named after Gandhi, Azad, Nehru. Rani Jhansi Brigade was an exclusively women force.
RRB NTPC Mock Test - 10 (English) - Question 2

The famous India Gate in New Delhi was designed by ________.

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 2
  • The India Gate was designed by Sir Edwin Lutyens.
  • It is a war memorial of the soldiers of the British Indian Army who died in the First World War.
  • Edwin Lutyens designed various buildings like Viceroy's House which is now known as Rashtrapati Bhavan with Herbert Baker.
  • Because of his marvellous work, an area in New Delhi is also known as Lutyens' Delhi.
RRB NTPC Mock Test - 10 (English) - Question 3

Which of the following article of Indian Constitution is related to the appointment of Attorney General of India?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 3

RRB NTPC Mock Test - 10 (English) - Question 4

Which among these is not adopted from the constitution of Ireland?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 4
  • Impeachment of President is not the source from the constitution of Ireland.
  • Impeachment of President is taken from the constitution of the USA. These are taken from the Constitution of Ireland.
  • Principles of State Policy
  • Method of Election of President
  • Nomination of members of Rajya Sabha
RRB NTPC Mock Test - 10 (English) - Question 5

Who among the following can provide the sanctions out of Contingency Fund of India?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 5
  • President of India can provide the sections out of Contingency Fund of India to meet the emergency expenditures of the country.
  • Article 267 empowers the parliament to establish the Contingency Fund of India.
  • In the year 2005, its limit was raised from Rs. 50 crore to Rs 500 crore.
  • Before sanctioning of money by the President, a bill is introduced in the Parliament for the approval.
RRB NTPC Mock Test - 10 (English) - Question 6

Trisul peak with a height of 7120 m is located in which of the following Indian State?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 6
  • Trisul peak is located in the Kumaon division in Bageshwar district of Uttarakhand.
  • It is a combination of 3 peaks that form a trident shape, Trishul, a weapon of Lord Shiva.
  • Trisul I: 7,120m
  • Trisul II: 6,690
  • Trisul III: 6,007
RRB NTPC Mock Test - 10 (English) - Question 7

The Saddle Peak in Andaman and Nicobar is located in which of the following part of the territory?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 7
  • Saddle Peak is located on the North Andaman.
  • It is the highest peak on Andaman and Nicobar islands with an elevation of 731m.
  • It is located near Diglipur, a town in North Andaman Island.
RRB NTPC Mock Test - 10 (English) - Question 8

The Indian Standard Meridian in India does NOT pass through which of the following state?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 8
  • Indian Standard Time is calculated on the basis of 82.5' E longitude, in Mirzapur Uttar Pradesh.
  • This 82.5' E is termed as Indian Standard Meridian.
  • This line pass through 5 Indian States namely: Madhya Pradesh, Uttar Pradesh, Chhattisgarh, Odisha, Andhra Pradesh.
  • According to this IST, time has an offset of UTC + 05:30.
RRB NTPC Mock Test - 10 (English) - Question 9

Who is the Director General of Civil Aviation of Airport Authority of India?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 9
  • B S Bhullar is the Director General of Civil Aviation of Airport Authority of India.
  • The Civil Aviation training college is in Allahabad.
  • Juhu Aerodrome is the first airport of India, Founded in 1928.
  • Most beautiful Airport: Kushok Bakula Rimpochee Airport, Ladakh
RRB NTPC Mock Test - 10 (English) - Question 10

Which of the following seaport is nearest to Rourkela Steel Plant?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 10
  • Paradip seaport is nearest to Rourkela Steel Plant.
  • Rourkela Steel Plant is the first integrated steel plant in the public sector in India.
  • Rourkela Steel Plant is in Odisha.
  • It was founded in 1955.
RRB NTPC Mock Test - 10 (English) - Question 11

Palakkad gap connects which of the following states?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 11
  • Palakkad gap connects Kerala and Tamil Nadu.
  • The pass is located between the Nilgiri Hills to the North and Anaimalai Hills to the South.
  • Palakkad Gap is also known as Palghat Gap.
RRB NTPC Mock Test - 10 (English) - Question 12

Who among these is known as the father of Indian Railway?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 12
  • Lord Dalhousie is known as the father of Indian Railway
  • Indian Railways was founded on 16 April 1853.
  • The Headquarters of Indian Railway is in New Delhi.
RRB NTPC Mock Test - 10 (English) - Question 13

Which of the following parts have the highest Blood pressure?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 13
  • The blood pressure is highest in Arteries, beginning from Aorta.
  • It loses pressure when it travels through the Capillaries, which are a bit leaky.
  • It is the lowest at the superior vena cava before it enters the Heart.
RRB NTPC Mock Test - 10 (English) - Question 14

Which among these is another name for Vitamin B2?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 14
  • Riboflavin is another name of Vitamin B2.
  • It is part of B-complex.
  • All vitamins of B-complex helps the body to convert carbohydrate into food, which can be used by the body.
RRB NTPC Mock Test - 10 (English) - Question 15

Which force is required to maintain a body in Uniform circular Motion?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 15
  • The Centripetal force is required to maintain a body in Uniform Circular Motion.
  • Centripetal Force acts when a body moves around the other body, the force that causes this acceleration and keeps the body moving along a circular path is acting towards the centre
RRB NTPC Mock Test - 10 (English) - Question 16

Total internal reflection cannot occur, when light ________

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 16
  • Total internal reflection cannot occur when light travels from Water to Glass because Total internal reflection can occur only when the light goes from a denser medium to rarer medium.
  • Here water has refractive index 1.33 and glass has 1.5-1.8, water is less dense as compared to glass, so when the light goes from water to glass Total internal reflection cannot take place.
RRB NTPC Mock Test - 10 (English) - Question 17

Pyrolusite is the ore of which of the following element?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 17
  • Pyrolusite is the ore of Manganese.
  • Manganese Symbol Mn .
  • Atomic number 25.
  • The metal is obtained by reduction of the oxide with sodium, magnesium, aluminium, or by electrolysis.
  • Pyrolusite is extensively used for the manufacture of spiegeleisen and ferromanganese.
  • Colour: Darkish, black to a lighter grey, sometimes bluish
RRB NTPC Mock Test - 10 (English) - Question 18

The average weight of two players P and Q of a football team is 38 kg. The average weight of P, Q and their coach T is 49 kg. What is the weight (in kg) of coach?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 18

Let the weight of the players ‘P’, ‘Q’ and ‘T’ (coach) be ‘p’, ‘q’, ‘t’ respectively

Given the average weight of both the players P and Q = 38 kg

⇒ (p + q)/2 = 38

⇒ (p + q) = 76     ----(1)

Also given the average weight of the players ‘P’, ‘Q’ and ‘T’ is 49

⇒ (p + q + t)/3 = 49

⇒ (p + q + t) = 147      ----(2)

Subtracting Equation 2 with Equation 1, we get the weight of the coach, t = (147 – 76) = 71

∴ Weight of the coach = 71 kg

RRB NTPC Mock Test - 10 (English) - Question 19

7 cos2θ + 3sin2θ = 4 and 0 < θ < π/2 , then the value of tanθ -

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 19

7cos2θ + 3 sin2θ = 4

3 sin2θ + 3 cos2θ + 4 cos2θ = 4

4 cos2θ = 4 - 3

RRB NTPC Mock Test - 10 (English) - Question 20

Raman goes to a place at a speed of 6 km/hr and returns back at 4 km/hr. What is his average speed (in km/hr)?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 20

Let, the distance = x km

Time taken to go at 6 km/hr = x/6 hr.

Time taken to come back at 4 km/hr = x/4 hr.

∴ Average speed,


⇒ 24/5

⇒ 4.8 km/hr

RRB NTPC Mock Test - 10 (English) - Question 21

The monthly salaries of A, B and C are in the ration 1: 2: 3. If C’s monthly salary is Rs. 1200 more than that of A, then what is B’s annual salary?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 21

given ; Ratio = 1:2:3

Earning of A =  x

Earning  of B = 2x

Earning of  C =  3x

According to question;

Earning of C = earning of A + 1200 

=> 3x =  1200+ x

=>  2x =  1200

 

But ( 2x ) is earning of B 

 

So, monthly income of ( B) = 1200

=> Annual income of B :-

1200 * 12 => 14400₹

Therefore, annual income of B is = ₹14400

RRB NTPC Mock Test - 10 (English) - Question 22

Rearrange the jumbled up letters in their natural sequence and find the odd one out.

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 22

LIOVTE → VIOLET

REGEN→ GREEN

LOWLEY → YELLOW

NATMEAG → MAGENTA

All colours are present in the rainbow except MAGENTA.

RRB NTPC Mock Test - 10 (English) - Question 23

Select the odd word from the given alternatives.

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 23

Only potato is grown underground, but not others.

RRB NTPC Mock Test - 10 (English) - Question 24

The expenses of a hostel consist of two parts, one part varies with the number of inmates while the other is always constant. When the number of inmates is 200 and 250, the expenses are Rs. 1300 and Rs. 1600 respectively. The expenses for 300 inmates are:

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 24

Let a and b are constants.

Given,

⇒ 1300 = 200A + B

⇒ 1600 = 250A + B

Solving equations,

⇒ 50A = 300

⇒ A = 6

Then,

⇒ B = 1300 - 1200 = 100

For 300 inmates,

Expenses = 300 × 6 + 100 = 1900

∴ Expenses for 300 inmates is Rs. 1900

RRB NTPC Mock Test - 10 (English) - Question 25

Directions: The following graph represents number of voters participating in election campaign from 6 different cities.

Q. The number of voters participating in the election campaign from city N in the year 2017 is approximately what per cent of the number of voters participating in the election campaign from city O in the same year?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 25

From the given graph,

⇒ Number of voters participating in the election campaign from city N in the year 2017 = 30 lakhs

⇒ Number of voters participating in the election campaign from city O in the year 2017 = 22.5 lakhs

Applying formula to find x is what % of y = (x/y) × 100%

⇒ (30/22.5) × 100%

⇒ 1.333 × 100% = 133.3%

∴ Required percentage = 133% (approximately)

RRB NTPC Mock Test - 10 (English) - Question 26

Directions: The following graph represents number of voters participating in election campaign from 6 different cities.

Q. What is the approximate–average number of voters participating in the election campaign from all the cities together in the year 2016?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 26

From the given graph,

⇒ Average number of voters in the year 2016 = Sum of all the voters in all the cities in 2016/Total number of cities

⇒ (27.5 + 27.5 + 30 + 32.5 + 22.5 + 35)/6

⇒ (175/6) Lakhs

⇒ 29.1666 Lakhs (approximately)

⇒ 29.17 Lakhs (approximately)

∴ Required Average = 2917000

RRB NTPC Mock Test - 10 (English) - Question 27

The angle subtended by the chord of length 10 cm is 120° at the centre. Calculate the distance of the chord (in cm) from the centre.

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 27

Given, ∠AOB = 120° & AB = 10 cm

Draw OD ⊥ AB

So, ∠DOB = 1/2 × ∠AOB = 1/2 × 120 = 60°

⇒ DB = 1/2 × 10 = 5 cm

Now, In ΔODB

⇒ cot 60° = OD/DB

⇒ 1/(√3) = OD/5

⇒ OD = 5/(√3)

Therefore, distance of the chord from the centre is 5/(√3)

RRB NTPC Mock Test - 10 (English) - Question 28

The angle of elevation from a point on the ground to the top of building and to top of chimney which is on building are x° and 45° and the height of building is ‘h’ meter. What is the height of chimney (in meter)?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 28


AB = is building with height h, b is height of chimney

In ΔABC
tanx = h/a
a = h cot x        ----(I)

H cot x = h + b

b = h (cot x - 1)   

RRB NTPC Mock Test - 10 (English) - Question 29

Two trains are moving in the opposite direction at speed of 30 km/hr and 45 km/hr respectively, whose lengths are 450 m and 550 m respectively. What is the time taken (in seconds) by slower train to cross the faster train?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 29

Their relative speed = 30 + 45 = 75 km/hr.

To convert it into m/s multiply it with 5/18

⇒ 75 × 5/18 = 20.833 m/s

Now the total distance to be travelled = 450 + 550 = 1000m

Time required by slower train to cross faster is = 1000/20.833 = 48s

∴ The time required by small train to cross the faster train is 48s

RRB NTPC Mock Test - 10 (English) - Question 30

What is the value of ?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 30

Value of 

⇒ 0.04 + 0.4 + 4

⇒ 4.44

∴ Ans = 4.44

RRB NTPC Mock Test - 10 (English) - Question 31

Find the value of x in the following equation:
1734.5 × 1768.9 ÷ 1727.4 = 17x

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 31

1734.5 × 1768.9 ÷ 1727.4 = 17x

⇒ 17= 17(34.5 + 68.9) ÷ 1727.4

⇒ 17= 17(103.4 - 27.4)

⇒ 17= 1776

⇒ x = 76

RRB NTPC Mock Test - 10 (English) - Question 32

If 11a + 11b = 29282 find the value of (a + b)/4

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 32

Given,

⇒ 11a + 11b = 29282

⇒ 11(a + b) = 29282

⇒ a + b = 29282/11

⇒ a + b = 2662

⇒ (a + b)/4 = 2662/4 = 665.5

RRB NTPC Mock Test - 10 (English) - Question 33

A factory has priced the tables at Rs. 900 each and allows a discount of 16% to the traders. If they gain 5% find the cost of manufacture?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 33

Given,

Marked price of a table = Rs. 900

Discount percentage = 16%

Selling price of a table = 900 - 900 × 16/100 = 756

Given,

Profit percentage = 5%

⇒ 5 = [(756 - C.P)/C.P] × 100

⇒ C.P = 15120 - 20C.P

⇒ 21C.P = 15120

⇒ C.P = 720

∴ Cost price of a table is Rs. 720.

RRB NTPC Mock Test - 10 (English) - Question 34

Two pipes P and Q can fill a tank in 3 hrs. and 4 hrs. respectively. If both pipes are opened together, then after what time, should P be closed so that the tank is full in 2 hrs. from the start

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 34

Given,

Pipe P 1 hour's work = 1/3

Pipe Q 1 hour’s work = 1/4

Pipe Q is opened for 2 hours then = 2 × 1/4 = 1/2

Remaining part of tank remain unfilled = 1 - 1/2 = 1/2

1/2 part will be filled by P in = (1/2) / (1/3) = 1.5

Pipe P should be closed after 1 hr 30 min.

RRB NTPC Mock Test - 10 (English) - Question 35

A number is multiplied by (7/11) instead of (2/3). New value is what percent of desired value?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 35

Let the number be x.

When this number is multiplied by 2/3, then we get = 2x/3

And when this number is multiplied by 7/11, then we get = 7x/11

Required Percentage = 

RRB NTPC Mock Test - 10 (English) - Question 36

The difference between 81% and 49% of a number is 768. What is 48% of the number?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 36

Let the number be x

81% of x = 0.81x

49% of x = 0.49x

Difference between 81% of x and 49% of x = 768

⇒ 0.81x - 0.49x = 768

⇒ 0.32x = 768

⇒ x = 2400

48% of x = 0.48x = 0.48 × 2400 = 1152

RRB NTPC Mock Test - 10 (English) - Question 37

Who among is known for the discovered Catalysis?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 37
  • Catalysis was discovered by Berzelius.
  • It is a term used for the reactions which occur in the presence of certain substances that increases the rate of the reaction without being consumed.

Catalysis is called:

  • Homogeneous when reactant and catalysis are in the same phase
  • Heterogeneous when reactant and catalysis are in a different phase
  • Autocatalysis when one of the product increases the rate of reaction.
RRB NTPC Mock Test - 10 (English) - Question 38

Which among these was the first microprocessor?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 38
  • Intel 4004 was the first microprocessor.
  • It was conceived by Ted Hoff and Stanley Mazor.
  • A microprocessor is the controlling element in a computer system.
  • They are classified into five types. That is as follows:
  • CISC-Complex Instruction Set Microprocessors
  • RISC-Reduced Instruction Set Microprocessor
  • ASIC-Application Specific Integrated Circuit
  • Superscalar Processors
  • DSP's-Digital Signal Microprocessors.
RRB NTPC Mock Test - 10 (English) - Question 39

Which among these is also known as ‘Zombie Army’?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 39
  • Botnet  is also known as ‘Zombie Army’
  • A botnet is a number of Internet computers that have been set-up to forward transmissions including spam and viruses to the computer without the knowledge of their owners.
  • It is a type of Security Threat.
RRB NTPC Mock Test - 10 (English) - Question 40

Brick is related to Building in the same way as Page related to

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 40

Building is made up of bricks and Book is made up of pages.

RRB NTPC Mock Test - 10 (English) - Question 41

Select the odd word from the given alternatives.

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 41

USA is a country in North America but Africa, Asia, Australia are the Continents.

RRB NTPC Mock Test - 10 (English) - Question 42

Select the odd word from the given alternatives.

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 42

Chandra Shekhar was the Prime Minister of India for 1990 - 1991 but others are names of the former President of India.

RRB NTPC Mock Test - 10 (English) - Question 43

Select the odd word from the given alternatives.

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 43

Except courage all others are the synonyms of fear.

RRB NTPC Mock Test - 10 (English) - Question 44

Read the given passage/argument and answer the question that follows it.
Usually, people who begin exercising experience a lot of pain in various parts of their body. But it is said that it is just a phase, the body gets used to the routine in a few weeks. But many people quit saying that the pain never went away for them. Which one of the following statements weakens the people's argument?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 44

All the options except 2 suggest the problems caused by pain. These strengthen the people's argument. Only 2 explains that bad posture causes pain. Posture is something which can be corrected in a second. If the posture is okay, the pain will be bearable.

So 2 weakens the argument.

RRB NTPC Mock Test - 10 (English) - Question 45

A statement is given followed by two inferences I and II. You have to consider the statement to be true even if it seems to be at variance from commonly known facts. You have to decide which of the given inferences, if any, follow from the given statement.

Statement: Sandeep is suffering from a bullet wound in spine, but wants to make a comeback to hockey.

Inferences:
I: Sandeep is passionate about hockey.
II: Sandeep has been in a very troublesome situation.

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 45

Sandeep, even after being shot, wants to come back to the world of hockey. So obviously he has a lot of passion for it. Also, one does not get shot just while walking on the road. Whenever there are guns involved, the situation is very tense and troublesome. Sandeep must have in such a situation if he was shot. So we see that both the inferences follow.

RRB NTPC Mock Test - 10 (English) - Question 46

Ram is hired as an intern on Monday, 7th August 2017. His internship will end on first Monday of August 2018. On which date Ram’s internship ends?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 46

Day on 7th August 2017 = Monday

Number of odd days in 2017 = 1

Day on 7th August 2018 = Tuesday

Day on 6th August 2018 = Monday.

Hence, Ram’s internship ends on 6th August 2018.

RRB NTPC Mock Test - 10 (English) - Question 47

If a mirror is placed on the line AB, then which of the answer figures is the right image of the given figure?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 47

The mirror image of the question will be:


Hence, we can say that option 4 is the correct mirror image of the given question.

RRB NTPC Mock Test - 10 (English) - Question 48

PM Narendra Modi flags off India’s fastest train Vande Bharat Express train between New Delhi and _______.

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 48
  • India’s first semi-high speed train, the Vande Bharat Express, was flagged off by Prime Minister Narendra Modi from the New Delhi Railway Station.
  • The train travels from Delhi to Varanasi in nine hours and forty-five minutes. This includes stoppage time of 40 minutes each at Kanpur and Allahabad.
  • The train had been produced indigenously at the Integral Coach Factory, Chennai.
  • The train has begun and it is running commercially from February 17 from Delhi to Varanasi.
RRB NTPC Mock Test - 10 (English) - Question 49

Krav Maga is a form of hybrid martial arts developed by which of the following country?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 49
  • Krav Maga is a form of hybrid martial arts developed in Israel by Israel Defense Forces.
  • It is combined techniques developed from boxing, wrestling, Aikido, judo and karate.
  • The ranking system in this technique is based on the coloured belt grading system which is originated from the judo ranking system.
RRB NTPC Mock Test - 10 (English) - Question 50

Select the related figure from the given alternatives:

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 50


Hence, answer is option ‘4’.

RRB NTPC Mock Test - 10 (English) - Question 51

Which among the following books was written by author Matthew Engel describing a story on railway?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 51
  • The book “Eleven Minute Late” was written by author Matthew Engel describing a story on railway.
  • Eleven Minutes Late: A Train Journey to the Soul of Britain was written in 2009.
  • It provides the backdrop to a history of Great Britain’s railways, focusing on the political environment rather than the technology.
RRB NTPC Mock Test - 10 (English) - Question 52

Who among the following wrote the book “How India Sees the World: Kautilya to the 21st Century”?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 52
  • Shyam Saran wrote the book “How India Sees the World: Kautilya to the 21st Century” in 2017.
  • The book shows part memoir and part thesis on India’s International relations since Independence.
  • Shyam Saran is a career diplomat born on September 4, 1946.
  • He has been India’s Ambassador to Myanmar, Indonesia and the Nepal and High Commissioner to Mauritius.
RRB NTPC Mock Test - 10 (English) - Question 53

Who among the following is the Chief Minister of Jharkhand?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 53
  • Raghubar Das is the Chief Minister of Jharkhand.
  • Constituency : Jamshedhpur East.
  • Jharkhand shares its border with Bihar, Uttar Pradesh, Chhattisgarh, Odisha and West Bengal.

Some facts about Jharkhand:

  • Capital : Ranchi
  • Number of Districts : 24
  • Governor : Draupadi Murmu
  • Rajya Sabha seats : 6
  • Lok Sabha seats : 14
RRB NTPC Mock Test - 10 (English) - Question 54

Who among the following is the governor of Madhya Pradesh?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 54
  • Anandiben Patel is the governor of Madhya Pradesh.
  • Constituency : Ghatlodiya
  • MP shares its boundary with Uttar Pradesh, Chhattisgarh, Maharashtra, Gujarat and Rajasthan

Some facts about Madhya Pradesh:

  • Capital : Bhopal
  • Chief Minister : Kamal Nath
  • State Animal : Barasingha
  • State Bird : Asian Paradise-flycatcher
RRB NTPC Mock Test - 10 (English) - Question 55

Which among these is the capital of Ethiopia?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 55
  • Addis Ababa is the capital of Ethiopia
  • Official languages: Amharic
  • Currency : Birr
  • Ethiopia shares its boundary with Eritrea, Djibouti, Somalia, Sudan and South Sudan, and Kenya.
RRB NTPC Mock Test - 10 (English) - Question 56

If A = 1, LION = 23 and CAMEL= 16 then what is the value of TIGER?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 56


A = 01

LION = L (1 + 2 = 3) + I (0 + 9 = 9) + O (1 + 5 = 6) + N (1 + 4 = 5) = 23

CAMEL = C (0 + 3) + A (0 + 1 = 1) + M (1 + 3 = 4) + E (0 + 5 = 5) + L (1 + 2 = 3) = 16

Similary,

TIGER = T (2 + 0 = 2) + I (0 + 9 = 9) + G (0 + 7 = 7) + E (0 + 5 = 5) + R (1 + 8 = 9) = 32

Hence, the correct answer is 32.

RRB NTPC Mock Test - 10 (English) - Question 57

If “$” means “Subtraction”, “@” means “Addition”, “#” means “Multiplication” and “!” means “Division”. Find the value of the following expression.

20 @ 40 $ 10 ! 5 # 14

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 57

Using BODMAS


20 + 40 - 10 % 5 * 14

= 20 + 40 - 2 * 14

= 20 + 40 - 28 = 60 - 28 = 32.

Hence, 32 is the correct answer.

RRB NTPC Mock Test - 10 (English) - Question 58

Select the related number from the given alternatives.
7 : 124 : : 63 : ?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 58

The logic followed is:

7 → 2- 1 = 8 - 1.

124 → 5- 1 = 125 - 1

63 → 43 - 1 = 64 - 1

342 → 7- 1 = 343 - 1

Hence, the correct answer is 342.

RRB NTPC Mock Test - 10 (English) - Question 59

Rearrange the jumbled-up letters in their natural sequence and find the odd one out.

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 59

SREIRBE → BERRIES

EALIPPPEN → PINEAPPLE

UAGAV → GUAVA

DONMAL → ALMOND

All except ALMOND are fruits.

RRB NTPC Mock Test - 10 (English) - Question 60

Rearrange the jumbled-up letters in their natural sequence and find the odd one out.

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 60

LETNARIG → TRIANGLE

RHESPE → SPHERE

RSEQUA → SQUARE

GCERALENT → RECTANGLE

All except sphere are two dimensional figures. Only sphere is a three dimensional figure.

RRB NTPC Mock Test - 10 (English) - Question 61

Select the odd word from the given alternatives.

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 61

Except oxygen all the others are greenhouse gases.

RRB NTPC Mock Test - 10 (English) - Question 62

A series is given with one missing term. Select the correct alternative from the given ones that will complete the series.
​A4X, D9U, ?, J25O

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 62

The pattern followed is:

Hence, the correct answer is G16R.

RRB NTPC Mock Test - 10 (English) - Question 63

AMERICA is written in a certain code as 7428657 and OCEAN as 35279, how will MARINE be written in the same code?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 63



Similarly,

Hence, the correct answer is 478692.

RRB NTPC Mock Test - 10 (English) - Question 64

COUNTRYSIDE is written in a certain code as APXBLFGWZMV, how will CITY be written in the same code?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 64


Similarly,

Hence, the correct answer is AZLG.

RRB NTPC Mock Test - 10 (English) - Question 65

In the questions given below, two statements are given followed by two/four conclusions I, II, III and IV. You have to consider the two statements to be true even if they seem to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follow the given statements.

Statements
1. All cats are dogs.
2. Some dogs are rats.
3. No rat is a cat.

Conclusion
1. All rats are dogs.
2. At least some cats being rat is a possibility.

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 65

The least possible Venn diagram is as follows,

Conclusion:
I) All rats are dogs → False (it is possible but not definite)
II) At least some cats being rat is a possibility → False.

Hence, neither conclusions I and II follows.

RRB NTPC Mock Test - 10 (English) - Question 66

In the questions given below, two statements are given followed by two/four conclusions I, II, III and IV. You have to consider the two statements to be true even if they seem to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follow the given statements.

Statements
1. All pens are books.
2.  All books are chairs.

Conclusions
1. All books are pens.
2.All chairs are pens.

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 66

The least possible Venn diagram is as follows,

I. All books are pens → False (It is possible but not definite)

II. All chairs are pens → False (It is possible but not definite)

Hence, neither conclusion I nor II follows.

RRB NTPC Mock Test - 10 (English) - Question 67

An Assertion (A) and Reason (R) are given below:

Assertion (A): We should drink plenty of water.
Reason (R): Milk is rich in nutrients.

Choose the correct option

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 67

We should drink plenty of water as water regulates a lot of metabolic activities in our body and helps in elimination of waste product from the from the body.

Milk is definitely rich in nutrients like calcium, protein etc.

MILK is rich in nutrients but not the reason for drinking water.

RRB NTPC Mock Test - 10 (English) - Question 68

An Assertion (A) and Reason (R) are given below:

Assertion (A): Earth is flattened sphere or oblate spheroid.
Reason (R): Earth has flattened poles and bulged at equator.

Choose the correct option

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 68

Reason given is supporting the assertion.

RRB NTPC Mock Test - 10 (English) - Question 69

In the month of January 2019, 6 monuments are declared as ‘protected and of national importance’ by Archaeological Survey of India. Which one of the following monument is not one of them?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 69

The Archaeological Survey of India (ASI) declared 6 monuments as ‘protected and of national importance’ in January 2019.

These sites are:

  • 125-year-old Old High Court Building in Nagpur, Maharashtra.
  • The Group of Temples in Ranipur Jharail in Bolangir district of Odisha.
  • 2 Mughal era monuments in Agra- Haveli of Agha Khan and Hathi Khana.
  • The Neemrana Baori in Alwar district of Rajasthan.
  • The Vishnu Temple in Kotali, Pithoragarh district in Uttarakhand.
RRB NTPC Mock Test - 10 (English) - Question 70

In January 2019, Who among the following has been named as the Emerging Player of the Year by International Cricket Council (ICC)?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 70
  • Rishabh Pant was named the International Cricket Council’s (ICC) Emerging Player of the Year.
  • He had an impressive show in India’s first-ever Test series win in Australia in December 2018.
  • The 21-year-old wicketkeeper-batsman scored 350 runs in the four-match Test series that India won 2-1 to script history in 71 years and 11 attempts.
  • He became the first Indian wicketkeeper to score a Test century in Australia.
RRB NTPC Mock Test - 10 (English) - Question 71

Answer the following questions on the basis of information given below.

A + B means B is the father of A.
A * B means B is the brother of A.
A % B means B is the sister of A.
A # B means B is the son of A.

Q. How is U related to S in the given expression?
T * S % R # U + P

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 71


Using the symbols above we draw the family tree diagram of the above expression: T * S % R # U + P: S is the brother of T, R is the sister of S, U is the son of R, P is the father of U.

Hence, U is the nephew of S.

RRB NTPC Mock Test - 10 (English) - Question 72

Answer the following questions on the basis of information given below.

A + B means B is the father of A.
A * B means B is the brother of A.
A % B means B is the sister of A.
A # B means B is the son of A.

Q. How T is related to R in the given expression?
​T * S % R # U + P

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 72


Using the symbols above we draw the family tree diagram of the above expression: T * S % R # U + P: S is the brother of T, R is the sister of S, U is the son of R, P is the father of U.

Insufficient data is provided in this question as we don’t know the gender of T. We are unable to define the relation between T and S.

RRB NTPC Mock Test - 10 (English) - Question 73

The 4th edition of annual “Aadi Mahotsav” in November 2018 was organised in which of the following city?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 73
  • The 4th edition of annual “Aadi Mahotsav” was organized by the Ministry of Tribal Affairs in at Dilli Haat, New Delhi.
  • It is a National Tribal Festival festival that is organised every year.
  • This year, more than 600 tribal artisans from 23 states, 80 tribal chefs hailing from 20 States took part in the Mahotsav.
RRB NTPC Mock Test - 10 (English) - Question 74

In March 2019, National Green Tribunal has fined which of the car manufacturing company fine of Rs. 500 crore for damaging the environment through the use of ‘cheat device’ in its diesel cars in India?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 74
  • The National Green Tribunal (NGT) ordered automobile giant Volkswagen to pay Rs. 500 crore as fine for “intentionally programming its diesel engines with cheat devices”.
  • A bench headed by NGT chairperson Justice Adarsh Kumar Goel directed the carmaker to deposit the amount within two months.
  • According to the expert panel report filed on December 24, 2018, estimated that Volkswagen cars released approximately 48.678 tonnes of NOx in 2016.
RRB NTPC Mock Test - 10 (English) - Question 75

Who among the following has been appointed as the new director of CBI?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 75

The 1983 batch IPS officer of Madhya Pradesh Cadre Rishi Kumar Shukla has been appointed as the new Director of Central Bureau of Investigation, CBI.
He will serve the post for a period of two years.
Rishi Kumar Shukla has already served as the DGP of Madhya Pradesh.

RRB NTPC Mock Test - 10 (English) - Question 76

In January 2019, Krishna Sobti passed away. She was a famous ________.

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 76

Krishna Sobti was a famous Hindi writer and essayist.
She had won the Sahitya Akademi Award in 1980 for her novel Zindaginama.
She was awarded the Jnanpith in 2017 for her contribution to Indian literature.
Some of her celebrated works include Daar Se Bichhudi, Mitro Marjani, Zindaginama, Dil-o-Danish etc.

RRB NTPC Mock Test - 10 (English) - Question 77

The Central Government designated Dera Baba Nanak land check post as an authorised immigration checkpoint to exit and entry for visiting Kartarpur Sahib Gurdwara. It is situated in which of the following district of Punjab?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 77
  • The Centre Government designated Dera Baba Nanak land check post in Gurdaspur district of Punjab as an authorised immigration checkpoint to exit and entry for visiting Kartarpur Sahib Gurdwara in Pakistan.
  • All classes of passengers with valid travel documents can exit or enter through the post.
  • The government also appointed the Chief Immigration Officer as the Civil Authority for the purpose.
RRB NTPC Mock Test - 10 (English) - Question 78

Union Minister Smt. Harsimrat Kaur Badal commissioned 1st Aqua Mega Food Park in which of the following district of Andhra Pradesh?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 78
  • Union Minister Smt Harsimrat Kaur Badal commissioned Godavari Mega Aqua Food Park at Tundurru Village in West Godavari District, Andhra Pradesh.
  • The park is promoted by M/s Godavari Mega Aqua Food Park Pvt. Ltd.
  • This is the 1st Mega Aqua Food Park operationalised and exclusively established for fish and marine products processing in the State of Andhra Pradesh.
  • Another Mega Food Park sanctioned by the Ministry in Chittoor District of Andhra Pradesh has already been inaugurated on 9th of July 2012.
  • The 3rd Mega Food Park sanctioned by the Ministry in Andhra Pradesh is under implementation at Krishna District.
RRB NTPC Mock Test - 10 (English) - Question 79

What is the name of the recently launched app by Infosys for engineering students?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 79
  • The country's second-largest IT services firm Infosys launched the 'InfyTQ' app.
  • It is a digital platform to offer learning and engagement experiences to engineering students in the country.
  • InfyTQ is a free platform open to all engineering students in their third and fourth years across India.
  • The platform encourages holistic development by imparting technical as well as professional skills, helping them become industry-ready.
RRB NTPC Mock Test - 10 (English) - Question 80

Which of the following Institute has launched a full-fledged B.Tech course in Artificial Intelligence?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 80
  • Indian Institute of Technology-Hyderabad (IIT-H) has announced the launch of a full-fledged bachelor’s programme in Artificial Intelligence (AI) technology from the new academic session, a first for the country and only the third globally.
  • IIT-H is already offering a Masters in Technology programme in AI-Machine Learning (ML).
  • Besides IIT, Carnegie Mellon University and Massachusetts Institute of Technology (MIT), both of which are in the US, offer full-fledged B.Tech programmes in AI.
RRB NTPC Mock Test - 10 (English) - Question 81

What is the name given to the first walking robot that navigates without GPS?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 81
  • Scientists have developed the first walking robot that can explore its environment and find its way home without GPS or mapping.
  • It is equipped with an optical compass used to determine its heading by means of polarised light.
  • With the help of an optical movement sensor directed to the Sun, it measures the distance covered.
  • Researchers from the French National Center for Scientific Research (CNRS) took inspiration from desert ants to design the AntBot.
RRB NTPC Mock Test - 10 (English) - Question 82

Who among the following has been named as brand ambassador of Rajasthan Royals?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 82
  • Australian spinner, Shane Warne has been named the brand ambassador of Rajasthan Royals for the upcoming edition of IPL.
  • He led Rajasthan Royals to its first and only IPL title in 2008.
  • Also, Rajasthan Royals has decided to change its jersey colour from blue to pink this year.
  • Ajinkya Rahane is the captain of Rajasthan Royals.
RRB NTPC Mock Test - 10 (English) - Question 83

Who among the following has won Australian Open Men’s Singles 2019 title at Melbourn?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 83
  • Novak Djokovic defeated Rafael Nadal to win his 7th Australian Open Men’s Singles title at Melbourn.
  • The resurgent world No. 1 outplayed the second-ranked Nadal 6-3, 6-2, 6-3 in a largely one-sided match.
  • In Women’s Singles, Japan’s Naomi Osaka clinched her maiden Australian Open Grand Slam Singles title in Melbourne.
RRB NTPC Mock Test - 10 (English) - Question 84

In a town 314 people are having pets (dogs, cats and parrots) in their house from which 130 people owns dogs, 66 owns only dogs, 30 people owns all three pets, 25 owns dogs and cats but not parrots, 52 owns cats and parrots but not dogs, 12 owns only parrots.
Answer the following questions on the basis of the provided information.

Q. How many people have cats only as their pets?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 84

No. of people who owns dogs only = 66

No. of people who owns dogs and cats = 25

No. of people who owns all = 30

No. of people who owns parrots and cats = 52

No. of people who owns parrots alone = 12

Total no. of people who owns pets = 314

No. of people that have cats only = total no. of people - no. of people owns dogs - no. of people owns parrots alone - no. of people owns parrots and cats both.

= 314 - 130 - 12 - 52 = 120

RRB NTPC Mock Test - 10 (English) - Question 85

In a town 314 people are having pets (dogs, cats and parrots) in their house from which 130 people owns dogs, 66 owns only dogs, 30 people owns all three pets, 25 owns dogs and cats but not parrots, 52 owns cats and parrots but not dogs, 12 owns only parrots.
Answer the following questions on the basis of the provided information.

Q. How many people own parrots?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 85

No. of people who owns dogs only = 66

No. of people who owns dogs and cats = 25

No. of people who owns all = 30

No. of people who owns parrots and cats = 52

No. of people who owns parrots alone = 12

Total no. of people who owns pets = 314

No. of people owns parrots = total no. of people owns pet - people owns dogs only - people cats only - people owns both cats and dogs.

= 314 - 66 - 120 - 25 = 103

RRB NTPC Mock Test - 10 (English) - Question 86

In a town 314 people are having pets (dogs, cats and parrots) in their house from which 130 people owns dogs, 66 owns only dogs, 30 people owns all three pets, 25 owns dogs and cats but not parrots, 52 owns cats and parrots but not dogs, 12 owns only parrots.
Answer the following questions on the basis of the provided information.

Q. How many people own dogs only?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 86

No. of people who owns dogs only = 66

No. of people who owns dogs and cats = 25

No. of people who owns all = 30

No. of people who owns parrots and cats = 52

No. of people who owns parrots alone = 12

Total no. of people who owns pets = 314

Hence, 66 people own dogs only.

RRB NTPC Mock Test - 10 (English) - Question 87

In a town 314 people are having pets (dogs, cats and parrots) in their house from which 130 people owns dogs, 66 owns only dogs, 30 people owns all three pets, 25 owns dogs and cats but not parrots, 52 owns cats and parrots but not dogs, 12 owns only parrots.
Answer the following questions on the basis of the provided information.

Q.How many people have at least two pets?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 87

No. of people who owns dogs only = 66

No. of people who owns dogs and cats = 25

No. of people who owns all = 30

No. of people who owns parrots and cats = 52

No. of people who owns parrots alone = 12

Total no. of people who owns pets = 314

No. of people have at least two pets = no. of people owns both dogs and cats + no. of people owns both cats and parrots + no. of people owns both dogs and parrots + no. of people owns all = 25 + 52 +9 + 30 = 116

RRB NTPC Mock Test - 10 (English) - Question 88

At a simple rate of interest, an amount of Rs.2100 becomes Rs. 2352 in 2 years. If the interest rate is decreased by 1% then what is the new interest in 2 years?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 88

Interest = PRT/100

Amount = Principal + Interest

Let the rate be r%

Interest = (2100 × r × 2)/100

2352 - 2100 = (2100 × r × 2)/100

252 = 42r ⇒ r = 6%

New rate of interest = r - 1 = 5%

Interest when r% is 5% = (P × (5) × 2)/100 = (2100 × 5 × 2)/100 = Rs. 210

RRB NTPC Mock Test - 10 (English) - Question 89

A boat takes 40 minutes to travel 12 km downstream, when the speed of stream is 8 km/hr. What is the speed of the boat in still water?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 89

Downstream speed = distance/time = 12/(40/60) = 18 km/hr

∵ Downstream speed = Speed in still water + Speed of stream

∴ Speed of boat in still water = Downstream speed – Speed of stream = 18 – 8 = 10 km/hr

RRB NTPC Mock Test - 10 (English) - Question 90

A person has 45 coins of 50p, 1 rupee and 2 rupee coins in ratio 6 : 2 : 1. Which of the following combinations will yield the same amount of total money (the order of is 25p, 50p and 1 rupee and the total number of coins).

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 90

Actual money with the person = 0.5((6/9) × 45) + 1((2/9) × 45) + 2((1/9) × 45) = 15 + 10 + 10 = Rs. 35

Total money in First case:

Total value of coins = 0.25((6/9) × 45) + 0.50((2/9) × 45) + 1((2/9) × 45) = 7.5 + 5 + 10 = Rs. 22.50

Total money in Second case:

Total value of coins = 0.25((6/9) × 90) + 0.50((2/9) × 90) + 1((2/9) × 90) = Rs. 45

Total money in Third case:

Total value of coins = 0.25((6/14) × 70) + 0.50((5/14) × 70) + 1((3/14) × 70) = Rs. 35

In third case, the amount is same

RRB NTPC Mock Test - 10 (English) - Question 91

Find the sum of money on which the difference between the compound interest (compounded annually) and the simple interest at the same rate of 5% per annum after 2 years is Rs. 10?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 91

Let the sum of money be Rs. ‘P’

Given, CI – SI = 10

⇒ P[(1 + Rate/100)Time – 1] – [(P × Rate × Time)/100] = 10

⇒ P[(1 + 5/100)2) – 1] – [(P × 5 × 2)/100] = 10

⇒ P[(1.05)2 – 1] – 0.1P = 10

⇒ 0.1025P – 0.1P = 10

⇒ 0.0025P = 10

⇒ P = 10/0.0025 = 4000

∴ Required sum = Rs. 4000

RRB NTPC Mock Test - 10 (English) - Question 92

Manu sold a watch for Rs. 1454.64 per watch and made a profit of 16%. Find the cost price of one dozen watches?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 92

Given profit % = 16

Selling price of each watch = Rs. 1454.64

Cost price of the watch × 1.16 = 1454.64

∴ Cost price of each watch = Rs. 1254

 Cost price of dozen watches = 1254 × 12 = Rs. 15048.00

RRB NTPC Mock Test - 10 (English) - Question 93

A train is moving at a speed of 56 km/hr covers a certain distance in 8 hours. If the same distance is to be covered in 7 hours, then what will be the speed (in km/hr) of the train?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 93

Given,

Speed of train = 56 km/hr and Time = 8 hrs

We know that,

Distance = Speed × Time

⇒ Distance = 56 × 8 = 448 km

To cover the same distance in 7 hrs,

Speed = 448/7 = 64 km/hrs

RRB NTPC Mock Test - 10 (English) - Question 94

Find the value of

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 94

RRB NTPC Mock Test - 10 (English) - Question 95

On selling an article for Rs. 270, the loss, that incurred, is as much as the profit when the article is sold at 10% profit. The cost price of the article is:

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 95

Let cost price of an article be Rs. A

Profit percentage = 10% = loss percentage

Then,

⇒ 10 = [(A - S.P)/A] × 100

⇒ A = 10A - 10S.P

⇒ S.P = 9A/10

Selling price of an article = Rs. 270

Given,

⇒ 9A/10 = 270

⇒ A = 300

∴ Cost price of an article is Rs. 300.

RRB NTPC Mock Test - 10 (English) - Question 96

What is the sum of the first 25 odd natural numbers?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 96

The numbers are 1, 3, 5, 7…., 49

Sum of n terms of an AP = n/2 × {2a + (n - 1)d}

Where a is the first term, n is the number of terms and d is the common difference

First term of the series (a) is 1

Common difference (d) = 3 - 1 = 2 and n is 25

Sum = 25/2 × (2 + 24 × 2) = 625

RRB NTPC Mock Test - 10 (English) - Question 97

A number when divided by 192 gives a remainder of 54. What remainder would be obtained on dividing the same number by 16?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 97

When a number x is divided by y and it leaves a remainder z,

the number (x + z) is always divisible by y

When number is divided by 192 and a remainder of 54 is obtained, the number can be written as

(192x + 54) where x is a natural number.

Now this number is divided by 16, both the sum of numbers can be individually divided by 16.

192x is divisible by 16 as 192 is divisible by 16

54 = (16 × 3) + 6

54 when divided by 16 leaves a remainder of 6 and quotient of 3 so when the sum is divided by

16, a remainder of 6 is obtained 

RRB NTPC Mock Test - 10 (English) - Question 98

A solid hemisphere has radius 14 cm. It is melted to form a cylinder such that the ratio of its curved surface area and total surface area is 2 : 3. What is the radius (in cm) of its base?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 98

According to question,

Curved surface area of cylinder/Total surface area of cylinder = 2/3

⇒ 2πRh/2πR(R + h) = 2/3

⇒ h/ (R + h) = 2/3

⇒ 3h = 2R + 2h

⇒ h = 2R       ---- (1)

∵ Volume of cylinder = Volume of solid hemisphere

⇒ πR2h = 2/3πr3 (where, R = radius of cylinder and r = radius of solid hemisphere)

Putting value of ‘h’ from equation (1),

⇒ R2 × 2R = (2/3) × 14 × 14 × 14

⇒ R3 = (14 × 14 × 14)/3

⇒ R = 14/∛3

∴ Radius of its base = 14/∛3 cm

RRB NTPC Mock Test - 10 (English) - Question 99

Sum of a fraction and thrice of its reciprocal is 73/20. What is the fraction?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 99

Let the fraction be x.

Reciprocal = 1/x

Then,

x + 3/x = 73/20

⇒ x2 + 3 = 73x/20

⇒ 20x2 – 73x + 60 = 0

⇒ x = {- (-73) + √ (5329 – 4800)}/40     or        x = {- (-73) - √ (5329 – 4800)}/40

⇒ x = 96/40 = 12/5                                or        x = 50/40 = 5/4

∴ the required fraction is 5/4 or 12/5.

RRB NTPC Mock Test - 10 (English) - Question 100

What is the LCM of 18/5 and 20/9?

Detailed Solution for RRB NTPC Mock Test - 10 (English) - Question 100

For finding the LCM of 2 fractions.

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