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    Question

    The ratio of the present ages of father and his son is

    9:4. The product of their ages 2 years ago was 34 times of his son’s age that year. What was son’s age 4 year ago?
    A 17 years Correct Answer Incorrect Answer
    B 12 years Correct Answer Incorrect Answer
    C 13 years Correct Answer Incorrect Answer
    D 16 years Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let present age of father and son be 9x and 4x respectively. According to question, => (9x – 2) (4x – 2) = 34 × (4x – 2) => (9x – 2) = 34 => 9x = 36 => x = 4 Therefore, son’s age 4 years ago = (4x – 4) = 12 years

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