Multiple Choice Questions on An alone can do a work in 8 days B alone can do the same work in 6 days In how many days A and B tog........... for CDS Exam Preparation

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Multiple Choice Questions

An alone can do a work in 8 days B alone can do the same work in 6 days In how many days A and B tog...........

Quantitative Aptitude (CDS) Time and work
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    An alone can do a work in 8 days. B alone can do the same work in 6 days. In how many days A and B together can start and complete the same work?

    23/4days
     

    Incorrect Answer

    5days
     

    Incorrect Answer

    24/7days
     

    Correct Answer

    20/3days

    Incorrect Answer
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    Explanation:

    A-> 8 = 2×4
    B-> 6 = 2×3
    total unit of work is 24.   (LCM of 8 and 6)
    A -> 3unit/day and B-> 4unit/day
    A+B= 7 unit/day
    The total day was taken by both when working together = 24/7days

    By: bhavesh kumar singh
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