12 year old Manik, is three times as old as his -brother Rahul. How old will Manik be when he is twice as old as Rahul?

12 year old Manik, is three times as old as his -brother Rahul. How old will Manik be when he is twice as old as Rahul?

A 14 years

B 16 years

C 18 years

D 20 years

Solution

Correct Answer: Option B

Question wise, Rahul = 4 years

Now, 2(4 + x) = (12 + x)

or, 8 + 2x = 12 + x

or, 2x - x = 12 - 8

or, x = 4

So, Manik's age will be = 12 + 4 = 16