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. (a) 24 years
B. (b) 8 years
C. (c) 12 years
D. (d) 16 years

Answer

B

Explanation

Let son.s age before 4 years = x Present age of the son = x + 4
At son.s birth father.s age
`= 3(x + 4) = 3x + 12`
The father.s present age
`= (3x +12) + (x + 4) = 48`
`implies4x=48` years -16=32
`impliesx=8` years
Therefore, 4 years ago the boy was = 12 - 4 = 8 years