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    Question

    The ratio of A and B present age is 9:4. The product of

    their ages is 3600. What will be the ratio of their ages after 5 years?
    A 17:11 Correct Answer Incorrect Answer
    B 19:9 Correct Answer Incorrect Answer
    C 17:7 Correct Answer Incorrect Answer
    D 13:9 Correct Answer Incorrect Answer

    Solution

    Let their present age be 9x and 4x respectively. Product of their ages = 36x² = 3600 => x² = 100 => x = 10 Present age of A = 9x = 90 years Present age of B = 4x = 40 years Ratio of their ages after 5 years = (90+5) : (40+5) = 95:45 = 19:9

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