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    Question

    The ratio of A and B present age is 7:4. The product of

    their ages is 2800. What will be the ratio of their ages after 5 years?
    A 17:11 Correct Answer Incorrect Answer
    B 9:4 Correct Answer Incorrect Answer
    C 13:8 Correct Answer Incorrect Answer
    D 5:3 Correct Answer Incorrect Answer

    Solution

    Let their present age be 7x and 4x respectively. Product of their ages = 28x² = 2800 => x² = 100 => x = 10 Present age of A = 7x = 70 years Present age of B = 4x = 40 years Ratio of their ages after 5 years = (70+5) : (40+5) = 75:45 = 5:3

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