IBPS RRB Office Assistant 24 Sep 2017 Paper

(1) Let the sum of the presentages of both children be xyears.
∴ Father’s present age
= 3x years
According to the question,
20 years hence,
3x + 20 = x + 40
⇒ 2x = 40 – 20 = 20
⇒ x = 10
∴ Father’s present age
= 30 years