Two pipes A and B can Separately fill a cistern in 20 min and 30 min respectively, while a third pipe C can empty the full cistern in 15 min

Question

Two pipes A and B can Separately fill a cistern in 20 min and 30 min respectively, while a third pipe C can empty the full cistern in 15 min. If all the pipe are opened together, in what time the full cistern is filled
1/60and 1/75 + or -​

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Arianna 5 months 2021-12-21T20:13:43+00:00 1 Answer 0 views 0

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    2021-12-21T20:15:23+00:00

    Step-by-step explanation:

    efiiciency of A+B−C=6

    5+4−C=6

    −C=6−5−4

    −C=−3

    C= 3 units/min

    Third pipe can empty the tank,

    T.C.C′seff.=3003=100minutes

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