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Discussion :: Time and Work

  1. 30 men can do a work in 40 days. When should 20 men leave the work so that the entire work is completed in 40 days after they leave the work?
    2. A.
    5 days
    B.
    10 days
    C.
    15 days
    D.
    20 days

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    Workspace

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    Answer : Option B

    Explanation :

    Total work to be done = 30 * 40 = 1200
    Let 20 men leave the work after 'P' days, so that the remaining work is completed in 40 days after they leave the work.
    40P + (20 * 40) = 1200
    40P = 400 => P = 10 days

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