Multiple Choice Questions on A alone can do a work in 40 days The ratio of time taken by A and B to do the same work is 5 3 Then ........... for IBPS RRB - Office Assistant/ Clerical Exam Preparation

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Multiple Choice Questions

A alone can do a work in 40 days The ratio of time taken by A and B to do the same work is 5 3 Then ...........

Quantitative Aptitude(IBPS RRB CL) Time and work
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    A alone can do a work in 40 days. The ratio of time taken by A and B to do the same work is 5: 3. Then, find in how many days both will complete the work together?

    18 days 

    Incorrect Answer

    12 days 

    Incorrect Answer

    20 days 

    Incorrect Answer

    15 days 

    Correct Answer

    10 days

    Incorrect Answer
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    Explanation:
    Let the time taken by A and B be 5x days and 3x days respectively.
    ⇒ 5x = 40 days
    ⇒ x = 8 days
    B’s time = 3 × 8 = 24 days
    Time taken by both together to complete the work
    = (40 * 24)/(40+24) = 15 days

    By: Munesh Kumari
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