Multiple Choice Questions on Two pipes P and Q can fill a tank in 6 hours and 8 hours respectively If they are opened on alt........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

Two pipes P and Q can fill a tank in 6 hours and 8 hours respectively If they are opened on alt...........

Quantitative Aptitude ( CCS) Pipes&cistern
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    Two pipes P and Q can fill a tank in 6 hours and 8 hours respectively. If they are opened on alternate hours and if pipe P is opened first, in how many hours, the tank shall be full ?

    10 hrs

    Incorrect Answer

    9.30hrs

    Incorrect Answer

    6.45hrs

    Correct Answer

    10.30hrs

    Incorrect Answer
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    Explanation:

    1/6+ 1/8  = 8+6/48 = 14/48 = 7/24…………in 2 hr
    = 21/24…………6hrs
    P => 6* 3/24 => 3/4 = 45min
    Total = 6hrs 45min

    Hence, option 3 is the correct answer.

    By: Amit Kumar
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