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Rahul is younger than Radha by 10 yrs. If 5 yrs back their ages were in the ratio 1:2, how old is Radha?
Let Rahul age = x years
⇒ Radha's age = (x + 10)years
⇒ x  5 /x + 105 = 1/ 2
⇒ 2x  10 = x + 5
⇒ x = 15 years
Hence, Radha's age = (15 + 10)years = 25 years
A circular swimming pool is surrounded by a concrete wall 4m wide. If the area of the concrete wall surrounding the pool is 11 25 that of the pool, then the radius (in m) of the pool is
The quantity of water in litres that must be added to 12 litres of beer priced at Rs 10 a litre to reduce the price to Rs 8 a litre is
Of the 3 numbers,second is twice the first and is also thrice the third. If the average of the three numbers is 44,the largest number is
The biggest number should be 72.
First, let’s start off by defining the numbers in terms of x. If the second number (the largest number) is defined by x, the first number is 1/2x and the third number is 1/3x. This is because the first number is half of the second number while the third number is a third of the second number.
Now that we have defined the three numbers in terms of x, let’s focus on the average given in the question. To find the average, you add up all the values and divide by the number of values.
Average= (Number 1+Number 2+Number 3)/number of values.
Since there are three numbers and the average is given, we can say
44=(1/2x+x+1/3x)/3
Multiply both sides by three
132=1/2x+x+1/3x
Add up all the like terms
132=11/6x
792=11x
x=72
What is the probability of getting at least one six in a single throw of three unbiased dice?
A man buys 2 dozen bananas at Rs.16 per dozen. After selling 18 bananas at the rate of Rs.12 per dozen, the shopkeeper reduced the rate to Rs.4 per dozen. The perent loss is :
C.P. = Rs (16X 2) = 32
S.P. = Rs (12 X 1.5 + 4 X 0.5) = Rs(18 + 2) = Rs 20
∴ Loss% = ( 12 32 X 100)% = 37.5%
At what an amount is doubled at the rate of 10% per annum simple interest
Amount is doubled mean interest = Principal
⇒ P X 10 X T/ 100 = P
⇒ Time,T = 10 year
In the following questions two equations numbered I and II are given. You have to solve both the equations and give answer.
I. √2304=a2304=a
II. b^{2} = 2304
a = √23042304
b^{2} = 2304
⇒ b = √23042304
Thus a = b
In the following questions two equations numbered I and II are given. You have to solve both the equations and give answer.
I. 12a^{2}  7a + 1 = 0
II. 15b^{2}  16b + 4 = 0
I. 12a^{2}  7a + 1 = 0
⇒ 12a^{2}  4a  3a + 1 = 0
⇒ 4a(3a  1) 1 (3a  1) = 0
⇒ (4a  1) (3a  1) = 0
⇒' 4a = 1 ⇒ a = 1414
3a = 1 ⇒ a = 1313
II. 15b^{2}  16b + 4 = 0
⇒ 15b^{2}  10b  6b + 4 = 0
⇒ 5b (3b  2)  2(3b  2) = 0
⇒ (3b  2)(5b  2) = 0
⇒ 3b = 2 5b = 2
⇒ b = 2/3 ⇒ b = 2/5
From I and II
Thus a < b
These questions are based on the graph which shows the Demand and Production statistics of the five companies.
What is the ratio of companies having more demand than production to those having more production than demand?
A, C and E have more demand.
B and D have more production .
So the ratio is 3 : 2
These questions are based on the graph which shows the Demand and Production statistics of the five companies.
What is the difference between the average demand and the average production of five companies taken together ?
Avg Demand = (3000 +600+2500+1200+3300)/5=10600/5 = 2120
Avg Production = 1840
So the Diff is 280
A survey conducted on 5800 villagers staying in various villagers and having variuos favourite fruits .
Mango is the favourite fruit of 50% of the people from Village C. People having their favourite fruit as Mango from Village C form approximately what percent of the people having their faviourite fruit as mango from all the villagers together ?
A survey conducted on 5800 villagers staying in various villagers and having variuos favourite fruits .
20% of the people from Village D have banana as their favourite fruit and 12% of the people from the same village have guava as their favourite fruit. How many people from the village like other fruits ?
People in villave D = 25% of 5800 = 1450
∴ Required no. of people
= {100  (20 + 12)} % of 1450
= 68% of 1450 = 986
In the following table regionwise market share (in percentage) of Companies A, B, C for three products a, b and g is shown.
Note: N= Northern region, S= Southern region, E= Eastern region, W=Western region.
What is the total sales of products α,βα,β and γγ of Companay A?
In the following table regionwise market share (in percentage) of Companies A, B, C for three products a, b and g is shown.
Note: N= Northern region, S= Southern region, E= Eastern region, W=Western region.
If another Company D also produce αα ,β,β and γγ and has the remaining market share of the three products in all the four region, then Company D has more than 50% market share.
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