The sum of the current ages of Natasha and Krishna is 50 years 10 years ago Krishna was twice as old...........

Quantitative Aptitude (CGL) Problems based on Ages

The sum of the current ages of Natasha and Krishna is 50 years. 10 years ago, Krishna was twice as old as Natasha. What is

Krishna’s current age?

This questions was previously asked in

SSC CGL 11 June 2019 Shift-3

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15 years

20 years

10 years

30 years

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Explanation:

Let us take the present age of Natasha is x and the present age of Krishna is y. So that,
x+y=50 ----- (i)
y=50-x
Ten year ago, Krishna was twice as old as Natasha so that,
(y-10)=2(x-10)
put the value of y
(50-x-10)=2x-20
from solving the equation we get
x=20
Put the value of x in equation (i)
20+y=50
y=30
So the present age of Krishna is 30 years.

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