Sharif is 12 yrs old. He is three times older than Kashem. What will be age of Sharif when he is two times older than Kashem?

A 16

B 24

C 36

D 28

Correct Answer: Option A

sharif's age 12 year kashem's age = 12/3=4 yrs suppose, after x years sharifs age would be double of kashems age here,

12+x=2(x+4) or, x=4 so, sharif's age = 12+4 = 16