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    Question

    7 men and 4 boys can complete a work in 6 days. A man

    completes double the work than a boy. In how many days will 5 men and 4 boys complete the work?
    A 7 3/7days Correct Answer Incorrect Answer
    B 7 5/7days Correct Answer Incorrect Answer
    C 6 1/7days Correct Answer Incorrect Answer
    D 5 2/7days Correct Answer Incorrect Answer

    Solution

    7 M + 4 B = 6 days and 1 man = 2 boys 7 M + 2 M = 6 days ⇒ 9M = 6 days 1 M = 6 `xx` 9 = 54 days Now, 5 M + 2M = 7M 1 M = 54 days 7M = `54/7 = 7 5/7days`

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