Top UPSC Doubts this Week
A cyclist travels at a speed of 30 km/h for 20 minutes, and then increases their speed to 50 km/h for the next 10 minutes. What is the total distance covered by the cyclist?- a)25 km
- b)18.33 km
- c)14.33 km
- d)15 km
Correct answer is option 'B'. Can you explain this answer?
A cyclist travels at a speed of 30 km/h for 20 minutes, and then increases their speed to 50 km/h for the next 10 minutes. What is the total distance covered by the cyclist?
a)
25 km
b)
18.33 km
c)
14.33 km
d)
15 km
|
Palak Kumar answered • Nov 09, 2024 UPSC |
Understanding the Problem
To determine the total distance covered by the cyclist, we need to calculate the distance traveled during each segment of the journey separately and then sum them.
Calculating the Distance for Each Segment
1. First Segment:
- Speed: 30 km/h
- Time: 20 minutes
Convert 20 minutes into hours:
20 minut... more
To determine the total distance covered by the cyclist, we need to calculate the distance traveled during each segment of the journey separately and then sum them.
Calculating the Distance for Each Segment
1. First Segment:
- Speed: 30 km/h
- Time: 20 minutes
Convert 20 minutes into hours:
20 minut... more
In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement". She glanced back to make sure she (wasn't to be) observed.- a)wasn't be
- b)wasn't being
- c)weren't being
- d)no improvement
Correct answer is option 'B'. Can you explain this answer?
In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement". She glanced back to make sure she (wasn't to be) observed.
a)
wasn't be
b)
wasn't being
c)
weren't being
d)
no improvement
|
Keerthana Yadav answered • Dec 01, 2023 UPSC |
The sentence is in past progressive passive form and hence being is used with past participle.
Read the each sentence to find out whether there is any grammatical error in it. The error, if any will be in one part of the sentence. The letter of that part is the answer. If there is no error, the answer is 'D'. (Ignore the errors of punctuation, if any).- a)One of the members
- b)expressed doubt if
- c)the Minister was an atheist.
- d)No error.
Correct answer is option 'B'. Can you explain this answer?
a)
One of the members
b)
expressed doubt if
c)
the Minister was an atheist.
d)
No error.
Correct formation of the sentence is " One of the members expressed doubt that the Minister was an atheist "
The ratio of the income of A and B is 7 : 8, and the ratio of the income of B and C is 8 : 11, If the difference in the income earned by A and C is Rs. 800, then find the sum of income earned by all three of them.- a)Rs. 5200
- b)Rs. 4800
- c)Rs. 4000
- d)Rs. 3600
Correct answer is option 'A'. Can you explain this answer?
The ratio of the income of A and B is 7 : 8, and the ratio of the income of B and C is 8 : 11, If the difference in the income earned by A and C is Rs. 800, then find the sum of income earned by all three of them.
a)
Rs. 5200
b)
Rs. 4800
c)
Rs. 4000
d)
Rs. 3600
|
Mainak Majumdar answered • Sep 17, 2024 UPSC |
Given:
Income ratio of A and B = 7 : 8
Income ratio of B and C = 8 : 11
Difference in income between A and C = Rs. 800
To find:
Sum of income earned by all three (A, B, and C)
Approach:
1. Let the income of A, B, and C be 7x, 8x, and 11y respectively.
2. Use the given ratios to form equations and solve them to find the values of x and y.
3. ... more
Income ratio of A and B = 7 : 8
Income ratio of B and C = 8 : 11
Difference in income between A and C = Rs. 800
To find:
Sum of income earned by all three (A, B, and C)
Approach:
1. Let the income of A, B, and C be 7x, 8x, and 11y respectively.
2. Use the given ratios to form equations and solve them to find the values of x and y.
3. ... more
A and B together have Rs. 1210. If 
of A's amount is equal to 
of B's amount, how much amount does B have?
- a)Rs. 460
- b)Rs. 484
- c)Rs. 550
- d)Rs. 664
Correct answer is 'B'. Can you explain this answer?
A and B together have Rs. 1210. If of A's amount is equal to of B's amount, how much amount does B have?
of A's amount is equal to of B's amount, how much amount does B have?a)
Rs. 460
b)
Rs. 484
c)
Rs. 550
d)
Rs. 664
|
Manoj Ghosh answered • Sep 09, 2019 UPSC |
A+B=1210(4/15)A=(2/5)B2A=3BTherefore, A=(3B)/2and substituting, (3B/2)+B=1210and hence, 5B=2420 => B=484 Rs.
Practice Quiz or MCQ (Multiple Choice Questions) with solution are available for Practice, which would help you prepare for Time & Distance under Quantitative Aptitude. You can practice these practice quizzes as per your speed and improvise the topic. The same topic is covered under various competitive examinations like - CAT, GMAT, Bank PO, SSC and other competitive examinations. Q. A man takes 5 hours 45 min in walking to a certain place and riding back. He would have gained 2 hours by riding both ways. The time he would take to walk both ways is- a)11 hrs
- b)8 hrs 45 min
- c)7 hrs 45 min
- d)9 hrs 20 min
Correct answer is option 'C'. Can you explain this answer?
Practice Quiz or MCQ (Multiple Choice Questions) with solution are available for Practice, which would help you prepare for Time & Distance under Quantitative Aptitude. You can practice these practice quizzes as per your speed and improvise the topic. The same topic is covered under various competitive examinations like - CAT, GMAT, Bank PO, SSC and other competitive examinations.
Q. A man takes 5 hours 45 min in walking to a certain place and riding back. He would have gained 2 hours by riding both ways. The time he would take to walk both ways is
a)
11 hrs
b)
8 hrs 45 min
c)
7 hrs 45 min
d)
9 hrs 20 min
|
|
Manoj Ghosh answered • Apr 16, 2023 UPSC |
Given that time taken for riding both ways will be 2 hours lesser than
the time needed for waking one way and riding back
From this, we can understand that
time needed for riding one way = time needed for waking one way - 2 hours
Given that time taken in walking one way and riding back = 5 hours 45 min
Hence The time he would take to walk both ways = 5 hours 45 min + 2 hours = 7 hours 45 min
In fact, you can do all these calculations mentally and save a lot of time
which will be a real benefit for you.
Direction: Study the following question carefully and choose the right answer.If ZOO is coded as 2, TAN is coded as 8, then what is the code for WAR?- a)3
- b)6
- c)4
- d)7
Correct answer is option 'B'. Can you explain this answer?
Direction: Study the following question carefully and choose the right answer.
If ZOO is coded as 2, TAN is coded as 8, then what is the code for WAR?
a)
3
b)
6
c)
4
d)
7
|
Nilesh Joshi answered • Apr 07, 2024 UPSC |
- Explanation:
Explanation of the coding pattern used to decipher the code for "WAR":
- Pattern:
- The code for each letter is determined by its position in the alphabet.
- The position of the letter in the alphabet is multiplied by the number of letters in the word.
- For example, Z (26th letter) is coded as 2 because 26 * 1 = 2. T (20th ... more
The study of ancient societies- a)Anthropology
- b)Archaeology
- c)History
- d)Ethnology
Correct answer is option 'B'. Can you explain this answer?
The study of ancient societies
a)
Anthropology
b)
Archaeology
c)
History
d)
Ethnology
|
|
Rahul Datta answered • Feb 16, 2020 UPSC |
Anthropology is the scientific study of humans, human behavior and societies in the past and present.
Archaeology is the scientific study of the material remains of past human life and activities.
History is the past as it is described in written documents, and the study thereof.
Ethology is the study of the characteristics of different peoples and the differences and relationships between them.
Archaeology is the scientific study of the material remains of past human life and activities.
History is the past as it is described in written documents, and the study thereof.
Ethology is the study of the characteristics of different peoples and the differences and relationships between them.
Seats for Mathematics, Physics and Biology in a school are in the ratio 5 : 7 : 8. There is a proposal to increase these seats by 40%, 50% and 75% respectively. What will be the ratio after increased seats?- a)2 : 3 : 4
- b)6 : 7 : 8
- c)6 : 8 : 9
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
Seats for Mathematics, Physics and Biology in a school are in the ratio 5 : 7 : 8. There is a proposal to increase these seats by 40%, 50% and 75% respectively. What will be the ratio after increased seats?
a)
2 : 3 : 4
b)
6 : 7 : 8
c)
6 : 8 : 9
d)
None of these
|
Ravi Singh answered • Mar 04, 2023 UPSC |
Originally, let the number of seats for Mathematics, Physics and Biology be 5x, 7x and 8x respectively.
Number after increased seats are (140% of 5x), (150% of 7x) and (175% of 8x).
⇒ (140 / 100 x 5x), (150 / 100 x 7x) and (175 / 100 x 8x)
⇒ 7x, 21x / 2 and 14x.
⇒ 7x, 21x / 2 and 14x.
∴ the required ratio
= 7x : 21x / 2 : 14x
⇒ 14x : 21x : 28x
⇒ 2 : 3 : 4.
⇒ 14x : 21x : 28x
⇒ 2 : 3 : 4.
Why do we feel more comfortable wearing light-colored clothes in the summer?- a)Because dark-colored clothes reflect most of the heat
- b)Because dark-colored clothes absorb more heat
- c)Because light-colored clothes trap heat better
- d)Because light-colored clothes absorb more heat
Correct answer is option 'B'. Can you explain this answer?
Why do we feel more comfortable wearing light-colored clothes in the summer?
a)
Because dark-colored clothes reflect most of the heat
b)
Because dark-colored clothes absorb more heat
c)
Because light-colored clothes trap heat better
d)
Because light-colored clothes absorb more heat
|
|
Devanshi Gupta answered • Jul 16, 2024 UPSC |
Why light-colored clothes are more comfortable in summer:
1. Absorption of heat:
- Dark-colored clothes tend to absorb more heat from the sun compared to light-colored clothes.
- When we wear dark clothing in the summer, it can trap heat close to our bodies, making us feel hotter and less comfortable.
2. Reflection of heat:
- Light-colored ... more
1. Absorption of heat:
- Dark-colored clothes tend to absorb more heat from the sun compared to light-colored clothes.
- When we wear dark clothing in the summer, it can trap heat close to our bodies, making us feel hotter and less comfortable.
2. Reflection of heat:
- Light-colored ... more
Some way to get instant discount on edurev infinity? Someone plzzzz help me!?
|
Alok Verma answered • Dec 21, 2019 UPSC |
Yes, if you are planning to purchase the EduRev Infinity plan today, you can use referral Code KAM9 discount of EduRev Infinity.
Higher the frequency of vibration, the __________ the pitch, and shriller the sound.- a)lower
- b)higher
- c)softer
- d)louder
Correct answer is option 'B'. Can you explain this answer?
a)
lower
b)
higher
c)
softer
d)
louder
|
|
Meera Datta answered • 4 weeks ago UPSC |
The Relationship Between Frequency and Pitch
When discussing sound, two crucial concepts are frequency and pitch. The frequency of a sound wave refers to how many vibrations occur per second, measured in Hertz (Hz).
Understanding Pitch
- **Pitch** is the perceptual quality that allows us to classify sounds as high or low. It directly correlates with the frequenc... more
When discussing sound, two crucial concepts are frequency and pitch. The frequency of a sound wave refers to how many vibrations occur per second, measured in Hertz (Hz).
Understanding Pitch
- **Pitch** is the perceptual quality that allows us to classify sounds as high or low. It directly correlates with the frequenc... more
Two statements are given followed by two conclusions numbered I and II. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.Statements:Some horses are not trucks.All horses are white.Conclusions:I. Some white are trucks.II. Some horses being truck is a possibility.- a)Only conclusion I follows
- b)Neither conclusion I nor II follows
- c)Only conclusion II follows
- d)Both conclusions I and II follow
Correct answer is option 'C'. Can you explain this answer?
Two statements are given followed by two conclusions numbered I and II. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.
Statements:
Some horses are not trucks.
All horses are white.
Conclusions:
I. Some white are trucks.
II. Some horses being truck is a possibility.
a)
Only conclusion I follows
b)
Neither conclusion I nor II follows
c)
Only conclusion II follows
d)
Both conclusions I and II follow
|
|
Sheena rane answered • Aug 28, 2024 UPSC |
Understanding the statements:
- The first statement tells us that there are some horses that are not trucks.
- The second statement states that all horses are white.
Analysis of Conclusions:
I. Some white are trucks:
- This conclusion cannot be logically inferred from the given statements. Just because all horses are white does not mean that some white ... more
- The first statement tells us that there are some horses that are not trucks.
- The second statement states that all horses are white.
Analysis of Conclusions:
I. Some white are trucks:
- This conclusion cannot be logically inferred from the given statements. Just because all horses are white does not mean that some white ... more
Consider the following pairs:1. Satluj River - Originates from Beas Kund2. Ravi River - Originates from Bara Bhangal Glacier3. Yamuna River - Forms the eastern boundary of Himachal Pradesh with Uttarakhand4. Spiti River - Joins the Satluj River near KhabHow many pairs given above are correctly matched?- a)Only one pair
- b)Only two pairs
- c)Only three pairs
- d)All four pairs
Correct answer is option 'C'. Can you explain this answer?
Consider the following pairs:
1. Satluj River - Originates from Beas Kund
2. Ravi River - Originates from Bara Bhangal Glacier
3. Yamuna River - Forms the eastern boundary of Himachal Pradesh with Uttarakhand
4. Spiti River - Joins the Satluj River near Khab
How many pairs given above are correctly matched?
a)
Only one pair
b)
Only two pairs
c)
Only three pairs
d)
All four pairs
Analysis of River-Origin Pairs
To determine how many pairs are correctly matched, let's analyze each statement one by one.
1. Satluj River - Originates from Beas Kund
- Explanation: The Satluj River actually originates from the Rakhigarhi region in Tibet, not Beas Kund. Hence, this pair is incorrect.
2. Ravi River - Originates from Bara Bhangal G... more
To determine how many pairs are correctly matched, let's analyze each statement one by one.
1. Satluj River - Originates from Beas Kund
- Explanation: The Satluj River actually originates from the Rakhigarhi region in Tibet, not Beas Kund. Hence, this pair is incorrect.
2. Ravi River - Originates from Bara Bhangal G... more
Which of the following statement is incorrect?
- a)In oxidation, oxygen in added to a substance.
- b)In reduction, Hydrogen is added to a substance.
- c)Oxidizing agent is oxidized.
- d)Reducing agent is oxidized
Correct answer is option 'C'. Can you explain this answer?
Which of the following statement is incorrect?
a)
In oxidation, oxygen in added to a substance.
b)
In reduction, Hydrogen is added to a substance.
c)
Oxidizing agent is oxidized.
d)
Reducing agent is oxidized
|
Vikram Kapoor answered • Nov 13, 2018 UPSC |
An oxidizing agent oxidizes other substances and gains electrons; therefore, its oxidation state decreases. Hence, it gets reduced.
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