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?
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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