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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 -
12 years
14 years
18 years
20 years
ANSWER : 4
Descrption
Let the present ages of son and father be x and (60 - x) years respectively. <br/> Then, (60 - x) - 6 = 5(x - 6) <br/> ⇒ 54 - x = 5x - 30 <br/> ⇒ 6x = 84 <br/> ⇒ x = 14 <br/> ∴ Son's age after 6 years = (x + 6) = 20 years.
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