Multiple Choice Questions on A amp B separately can do a piece of work in 9days and 12days respectively If they work for a day al........... for Uttarakhand Civil Services (UKPCS) Preparation

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Multiple Choice Questions

A amp B separately can do a piece of work in 9days and 12days respectively If they work for a day al...........

Quantitative Aptitude Time and work
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    A & B separately can do a piece of work in 9days and 12days respectively. If they work for a day alternatively, A starts the work, in how many days will the work will get completed?

    12(1/4)

    Incorrect Answer

    10(1/4)

    Correct Answer

    8(1/6)

    Incorrect Answer

    10(5/6)

    Incorrect Answer
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    Explanation:

    Solution:
      A=9        4
      B=12      3          [LCM=36]
      2 days alternate            (4+3) = 7 days
      2*5                                    7*5
      10days                             35days
       now A’s turn so-  10(1/4) days

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