The ages of A and B are in the ratio 3 : 1. After 15 years, the ratio will be 2 : 1. Find their present ages.

मान लीजिए आयु 3x और x है। (3x + 15) / (x + 15) = 2/1 => 3x + 15 = 2x + 30 => x = 15। आयु 3*15 = 45 और 1*15 = 15 है।