Multiple Choice Questions on Two pipes can fill the tank in 4hrs 5hrs respectively while the third pipe can empty the tank in 20h........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

Two pipes can fill the tank in 4hrs 5hrs respectively while the third pipe can empty the tank in 20h...........

Quantitative Aptitude ( CCS) Pipes&cistern
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    Two pipes can fill the tank in 4hrs 5hrs respectively while the third pipe can empty the tank in 20hrs, if all the pipes are opened together, then the tank will be filled in

    2.30hrs

    Correct Answer

    2.50hrs

    Incorrect Answer

    3.20hrs

    Incorrect Answer

    3.30hrs

    Incorrect Answer
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    Explanation:

    1/4+1/5 -1/20 = 5+4-1/20 = 8/20
    20/8 => 2(1/2)hrs

    Hence, option 1 is the correct answer.

    By: Amit Kumar
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