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Discussion :: Time and Work

  1. A is thrice as efficient as B and is, therefore, able to finish a piece of work 10 days earlier than B. In how many days A and B will finish it together?
    2. A.
    3 1/2 days
    B.
    3 4/5 days
    C.
    3 days
    D.
    5 days

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    Workspace

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    Answer : Option D

    Explanation :

    WC = 3:1

    WT = 1:3

    x                   3x

    1/x “ 1/3x = 1/10

    x = 20/3

    3/20 + 1/20 = 1/5 => 5 days

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