Question

age of a father is 3 times that of his son. 5 years later, he will be two and half times as old as his son. How old is his son now?

Answer 1

Let father's age and son's age be x and y years respectively.

Given, x = 3y

x + 5 = 5(y + 5)/2

=> 3y + 5 = 5(y + 5)/2 = (5y + 25)/2

=> 6y + 10 = 5y + 25

=> y = 15

x = 3 X 15 = 45

Hence, father's age and son's age are 45 years and 15 years respectively.