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

Options

A. 14 years
B. 16 years
C. 18 years
D. 20 years

Answer

B

Explanation

Present age of Manick = 12 years.
Then present age of Rahul = 4 years. (given)
After x years, Manick.s age = 12 + x
After x years, Rahul.s age = 4 + x
According to the question
`(12 + x) = 2(4 + x)`
or, `12 + x = 8 + 2x `
or, `x = 4`
Therefore, Required age of Manick = (12+ x) years
= (12 + 4) years
= 16 years