A father tells his son, "I was three times of your present age when you were born." If the father's present age is 48 years, how old was the boy 4 years ago?

Options

A. 24 years
B. 8 years
C. 12 years
D. 16 years

Answer

B

Explanation

Let the present age of son is x years, then the age of father at the time of birth will be 3x years. Hence, as per question.
`3x + x = 48`
`implies 4x = 48`
`therefore x = 12` years
Hence, the age of son 4 years ago
`= (12 - 4)` years = 8 years