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    Question

    The ratio of a father’s age to his son’s age is 7 :

    4. The product of the numbers representing their ages is 1372. The ratio of their ages after 8 years will be:
    A 19 : 11 Correct Answer Incorrect Answer
    B 19 : 12 Correct Answer Incorrect Answer
    C 19 : 13 Correct Answer Incorrect Answer
    D 19 : 14 Correct Answer Incorrect Answer

    Solution

    Let ages be 7x and 4x 7x × 4x = 1372 → 28x² = 1372 → x² = 49 → x = 7 Father’s age = 49, Son’s age = 28 After 8 years → Father = 57, Son = 36 Ratio = 57 : 36 = 19 : 12

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