Multiple Choice Questions on A is 25 more efficient than B C does half the work done by A amp B together If C alone does the work........... for SSC CGL Exam Preparation

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Multiple Choice Questions

A is 25 more efficient than B C does half the work done by A amp B together If C alone does the work...........

Quantitative Aptitude (CGL) Time and work
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    A is 25% more efficient than B. C does half the work done by A & B together. If C alone does the work n 30 days, then A alone can do the work in

    32 days

    Incorrect Answer

    27 days

    Correct Answer

    22 days

    Incorrect Answer

    25(1/2) days

    Incorrect Answer
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    Explanation:

    A’s one day’s work:B’s one days work = 125:100 = 5:4
    Let A’s & B’s one day’s work be 5x and 4x days
    Then C’s one day’s work = 9x/2
    = > 9x/2 = 1/30
    = > x = ((1/30)*(2/9)) = 1/135
    A’s one day’s work = 5/135  = 1/27 = 27 days

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