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Discussion :: Time and Work

  1. A can do a job in 18 days and B can do it in 30 days. A and B working together will finish twice the amount of work in ------- days?
    2. A.
    21 ½ days
    B.
    22 ½ days
    C.
    23 ½ days
    D.
    12 ½ days

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    Answer : Option B

    Explanation :

    1/18 + 1/30 = 8/90 = 4/45

    45/4 = 11 ¼ *2 = 22 ½ days

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