A man's age is now 3 times his son's age. Eight years back, the man's age was 5 times his son's age. What is the present age of the son?

A 15

B 20

C 18

D 16

Solution

Correct Answer: Option D

Let Man's son's present age = x
Man's present age = 3x

According to the question
5(x - 8) = 3x - 8
⇒ 5x - 40 = 3x - 8
⇒ 5x - 3x = 40 - 8
⇒ 2x = 32
x = 16

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