The present ages of Mahesh and his son are in the ratio 7 : 2. Fifteen years from now their ages will be in the ratio 2 : 1. The son's present age (in years) is:

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Accepted Answer

10. Let the present ages be 7x and 2x. Then (7x + 15)/(2x + 15) = 2/1 → 7x + 15 = 4x + 30 → 3x = 15 → x = 5. The son is 2 × 5 = 10 and Mahesh is 35. (Check: in fifteen years they are 50 and 25, a ratio of 2 : 1.)

The present ages of Mahesh and his son are in the ratio 7 : 2. Fifteen years from now their ages will be in the ratio 2 : 1. The son's present age (in years) is:

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