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Discussion :: Time and Work

  1. A is 30% more efficient than B. How much time will they, working together, take to complete a job which A alone could have done in 23 days?
    2. A.
    11 days
    B.
    13 days
    C.
    20 3/17 days
    D.
    None of these

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    Workspace

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    Answer : Option B

    Explanation :

    Ratio of times taken by A and B = 100:130 = 10:13

    Suppose B takes x days to do the work.

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