In ten years, A will be twice as old as B was 10 years ago.

Home » Aptitude » Problems on Ages » Question

In ten years, A will be twice as old as B was 10 years ago. If A is now 9 years older then B. Find the present age of B ?

1. 39 year
2. 40 year
3. 36 year
4. 49 year

Correct Option: A

Let B's present age be x years then A's present age be (x + 9) years
As per the given condition
(x + 9 + 10) = 2(x - 10)
⇒ x = 39

∴ The present age of B = 39 years