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. What will be the son’s age after 6 years?

Let 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 years

Son’s age after 6 years= ( x + 6 ) = 20 years.

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