Question 5

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?

Solution

Option D is correct,

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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