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    Question

     Present ages of A and B are in the ratio 5:7. After 8

    years, their ages will be in the ratio 7:9. What is the sum of their present ages?
    A 28 yrs Correct Answer Incorrect Answer
    B 48 yrs Correct Answer Incorrect Answer
    C 32 yrs Correct Answer Incorrect Answer
    D 18 yrs Correct Answer Incorrect Answer

    Solution

    Let present ages be 5x and 7x After 8 years: (5x + 8) / (7x + 8) = 7 / 9 9(5x + 8) = 7(7x + 8) 45x + 72 = 49x + 56 16 = 4x x = 4 Present ages: A = 20 B = 28 Sum = 48 years

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