Multiple Choice Questions on P and Q clean the room in 18 hours and 15 hours resp If P works for 3 hours and Q works for the rema........... for Bihar civil service (BPSC) Preparation

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Multiple Choice Questions

P and Q clean the room in 18 hours and 15 hours resp If P works for 3 hours and Q works for the rema...........

Quantitative Aptitude (CSC) Time and work
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    P and Q clean the room in 18 hours and 15 hours resp. If P works for 3 hours and Q works for the remaining time only, then in how many hours would Q complete the remaining work?

    10(1/2) hours

    Incorrect Answer

    13(1/4) hours

    Incorrect Answer

    10(1/5) hours

    Incorrect Answer

    12(1/2) hours

    Correct Answer
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    Explanation:

    Work done in first 3 hours = 3*1/18 = 1/6
    Remaining work = 1 – 1/6 = 5/6
    Work completed by Q in 5/6/1/15 = 12(1/2) hours

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