UGC NET Paper 1 GA 2016 Aug Solved Paper

Let the present age of son = x
Mother age = 3x
after 5 years,
x + 5 + 3x + 5 = 70
4x+ 10 = 70
4x = 60, x = 15
∴ Son present age =15 years
Mother present age = 15 × 3 = 45 yrs
Age of mother after 10 yrs = 45 + 10 = 55 years