Multiple Choice Questions on A pipe can fill a cistern in 140 mins and B pipe can fill it in 105 mins They are opened together bu........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A pipe can fill a cistern in 140 mins and B pipe can fill it in 105 mins They are opened together bu...........

Quantitative Aptitude ( CCS) Pipes&cistern
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    A pipe can fill a cistern in 140 mins and B pipe can fill it in 105 mins. They are opened together but due to a leakage they take 10 min more to fill the tank. Find in how many minutes will leakage empty the tank?

    240 mins

    Incorrect Answer

    360 mins

    Incorrect Answer

    420 mins

    Correct Answer

    210 mins

    Incorrect Answer
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    Explanation:

    Solution :
    A=140————3 (total=420)
    B=105————4
    A+B=420/7=60 mins
    A+B+leakage=70 mins
    420/70=6 (1 mins work)
    7-6=1
    leakage=420/1=420 mins

    By: Pranav Gupta
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