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    Question

    The ages of A, B and C are in the ratio of 4:7:9

    respectively. If the sum of their ages is 40 years, then find the age of B.
    A 18 years Correct Answer Incorrect Answer
    B 12 years Correct Answer Incorrect Answer
    C 8 years Correct Answer Incorrect Answer
    D 14 years Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let the ages of A, B and C be 4x, 7x and 9x respectively. According to the question, => 4x + 7x + 9x = 40 => 20x = 40 => x = 2 Age of B = 7x = 7×2 = 14 years.

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