Question
The ratio of the present age of A and B is 3 : 1. Five
years ago, the ratio of their ages was 5 : 1. The age of A (in years) after eight years will be:Solution
ATQ,
Let: A = 3x, B = x (present ages) 5 years ago: (3x − 5)/(x − 5) = 5/1 → 3x − 5 = 5x − 25 → 20 = 2x ⇒ x = 10 → A = 3x = 30 → A after 8 years = 30 + 8 = 38
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