Multiple Choice Questions on Two pipes A and B can fill a tank in 8 minutes and 12 minutes respectively If both the pipes are ope........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

Two pipes A and B can fill a tank in 8 minutes and 12 minutes respectively If both the pipes are ope...........

Quantitative Aptitude ( CCS) Pipes&cistern
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    Two pipes A and B can fill a tank in 8 minutes and 12 minutes respectively. If both the pipes are openedsimultaneously, after what time should B be closed so that the tank is full in 6 minutes?

    1 min

    Incorrect Answer

    2 min

    Incorrect Answer

    3 min

    Correct Answer

    4 min

    Incorrect Answer
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    Explanation:

    Answer & Explanation
    Answer – c) 3 min
    Explanation :
    Let after x minutes pipe B is closed
    (1/8 + 1/12)*x + (1/8)*(6 -x) = 1
    X= 3 minutes

    By: Manpreet kaur
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