The sum of the present ages of a father and his son is 60 years. Six years ago, father's age was five times the age of the son. After 6 years, son's age will be-

Question: The sum of the present ages of a father and his son is 60 years. Six years ago, father's age was five times the age of the son. After 6 years, son's age will be-

Solution:
Let the present ages of son and father be x and (60 - x) years respectively.
Then,
⇒ (60 - x) - 6 = 5(x - 6)
⇒ 54 - x = 5x - 30
⇒ 6x = 84
∴ x = 14.
∴ Present age of son = 14 years

So, After 6 years, son's age = 14 + 6 = 20 years