Multiple Choice Questions on A can do a piece of work in 20 days B in 15 days and C in 12 days In how many days can A finish the ........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A can do a piece of work in 20 days B in 15 days and C in 12 days In how many days can A finish the ...........

Quantitative Aptitude ( CCS) Time and work
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    A can do a piece of work in 20 days. B in 15 days and C in 12 days. In how many days can A finish the work if he is assisted by B on one day and C on the next, alternately?

    2

    Incorrect Answer

    10

    Incorrect Answer

    9

    Incorrect Answer

    8

    Correct Answer
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    Explanation:

    A + B = 1/20 + 1/15 = 7/60
    A + C = 1/20 + 1/12 = 8/60
    7/60 + 8/60 = 15/60 = 1/4
    4 days * 2 = 8 days

    By: MIRZA SADDAM HUSSAIN
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    Let's Discuss

    Denis Singla

    question has given that A and C completed the work in 12 days, not only C

    0 0 reply

    NITIKA BALI

    A+c together can complete in 12 days so accordingly there one day work is 1/12 ; 7/60+1/12=1/5 5*2=10 days

    0 0 reply

    Brijesh Kumar

    Rectified . it is A completes work in 12 days not A+C.

    0 0 reply
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