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Discussion :: Time and Work

  1. 9 men and 12 boys finish a job in 12 days, 12 men and 12 boys finish it in 10 days. 10 men and 10 boys shall finish it in how many days?
    2. A.
    8
    B.
    10
    C.
    12
    D.
    14

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    Answer : Option C

    Explanation :

    9M + 12B ----- 12 days

    12M + 12B ------- 10 days

    10M + 10B -------?

    108M + 144B = 120M +120B

    24B = 12M => 1M = 2B

    18B + 12B = 30B ---- 12 days

    20B + 10B = 30B -----? => 12 days

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