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    Question

    A man does double the work done by a boy in the same

    time. The number of days that 3 men and 4 boys will take to finish a work which can be done by 10 men in 8 days is
    A 4 Correct Answer Incorrect Answer
    B 16 Correct Answer Incorrect Answer
    C 3/11 Correct Answer Incorrect Answer
    D 4/5 Correct Answer Incorrect Answer

    Solution

    work done by man : work done by boy = 2: 1 let work done by a man in 1 day = 2 units let work done by a boy in 1 day = 1 units work done by 10 men in 8 days = 10 × 2 × 8 = 160 units work done by 3 men and 4 boys in 1 day = 3 × 2 + 4 × 1 = 10 units number of days = 160/10 = 16 days

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