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

A. 14 years

B. 16 years

C. 18 years

D. 20 years

Answer: Option B

Solution(By Examveda Team)

Manick's present age = 12 years, Rahul's present age = 4 years.
Let Manick be twice as old as Rahul after x years from now.
Then, 12 + x = 2 (4 + x) ⇔ 12 + x = 8 + 2x ⇔ x = 4.
Hence, Manick's required age = 12 + x = 16 years.