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Two pipes A and B can fill a tank in 36 ...

Two pipes A and B can fill a tank in 36 minutes and 45 minutes respectively. Another pipe C can empty the tank in 30 minutes. First A and B are opened. After 7 minutes, C is also opened. The tank is filled up in

Answer

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Two pipes A and B can fill a tank in 20 and 24 minutes. Resepctively. Pipe C can empty the tank in 10 minutes. Pipes A and B are opened for 5 minutes and then pipe C is also opend. In what time can tank become full or empty after opening pipe C?

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Knowledge Check

  • Two pipes A and B can fill a tank with water in 30 minutes and 45 minutes respectively. The water pipe C can empty the tank in 36 minutes. First A and B are opened. After 12 minutes C is opened. Total time (in minutes) in which the tank will be filled up is:

    A
    30
    B
    12
    C
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    D
    24

  • Pipes A and B can fill a tank in 18 minutes and 22 1/2 minutes, respectively while pipe C can empty the full tank in 12 minutes. A and B are opened together for 6 minutes and then closed. Now C is opened. C alone will empty the tank in ..........

    A
    5 minutes
    B
    `8 2/5` minutes
    C
    `7 1/5` minutes
    D
    6 minutes

  • Pipe A can fill a cistern in 4 minutes and pipe B can fill it in 5 minutes. Pipe C can empty it in 2 minutes. First A and B are opened. After 2 minutes C is also opened. In how much time, the tank is emptied?

    A
    12 min.
    B
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    C
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    D
    20 min.

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    Two pipes A and B can fill a tank in 12 minutes and 15 minutes respectively while a third pipe C can empty the full thank in 20 minutes.All the three pipes are opened in the beginning. However,pipe C is closed 6 minutes before the tank is filled.In what time will the tank be full?

    Pipes P and Q can fill a tank in 18 and 27 minutes, respectively, whereas pipe R can empty thefull tank in 54 minutes. P and Q were opened together for 6 minutes and then closed and R was opened. The tank was emptied by R alone in:

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    Two pipes A and B can fill a tank in 100 minutes and 120 minutes respectively. Pipe C can alone empty the same tank in 200 minutes. If all three pipes are opened together, then in how many minutes will the tank be filled?

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