Delhi Police Constable 2009 Paper

Question : 53 of 100

Marks: +1, -0

A man at present is 4 times as old as his son.20 years later he will be only twice as old as his son. The present age of the son is:

Solution:

Let present age of son and his father be x and 4x years respectively, Then

2(x + 20) = 4x + 20

⇒2x=20

⇒x=10

Thus, present age of son = 10 years.

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