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.

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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.

A10: 17

B13 : 18

C12: 19

D11: 14

Answer:

C. 12: 19

Read Explanation:

Let the ratio of ages of A, B and C is be 2x, 4x and 5x respectively. 2x + 4x + 5x = 77 11x =77 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 Ratio of ages of A to B 10 years hence = 24:38 = 12:19

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