Question
The ratio of ages of A, B and C is 2 : 4 : 5 and sum of
their ages is 77. Find the ratio of A's age to B's age ten years hence.Solution
Let the ratio of ages of A, B, and C is 2x, 4x, and 5x respectively. ATQ, 2x + 4x + 5x = 77   11x = 77  x = 77/11  x = 7 10 years hence age of A = 2 x 7 + 10 = 14 + 10 = 24 10 years hence age of B = 4 × 7 + 10 = 28 + 10 = 38 The ratio of ages of A to B 10 years  = 24:38 = 12:19
42, 54, 78, 114, 168, 222
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