Ravi has spent a quarter (1/4) of his life as a boy , one fifth (1/5) as a youth , one third (1/3) as a man and thirteen (13) years in old age . What is his present age?
Correct Answer: 60 years
Explanation:
Suppose that the Ravi present age is A years.
According to the given question, A/4 + A/5 + A/3 + 13 = A ⇒ (15A + 12A + 20A)/60 = A - 13 ⇒ 47A = 60A - 780 ⇒60A - 47A = 780 ⇒13A = 780 ∴A = 780/13 = 60 years
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