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A pipe can empty a tank  in 40 minute...

A pipe can empty a tank  in 40 minutes. A second pipe with diameter twice as much as that of the first is also attached with the tan to empty it. How much time will the tow pipes together take to empty the tank?

Answer

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Pipe 'A' can empty a full tank in 20 minutes. The diameter of another pipe 'B' is twice the diameter of pipe A. If both pipes A and B are joined to the tank, the time taken by both pipes to empty the tank is.

Pipe A can fill an empty tank in 5 hours while pipe B can empty the full tank in 6 hours.If both are opened at the same time in the empty tank,how much time will they take to fill it up completely?

Knowledge Check

  • A pipe can empty a tank in 40 minutes. A second pipe with diameter twice as much as that of the first is also attached with the tank to empty it. The two together can empty the tank in:

    A
    8 minutes
    B
    `13(1)/(3)` minutes
    C
    30 minutes
    D
    38 minutes

  • A pipe can empty a tank in 20 minutes. The second pipe B has a diameter twice as that of A. If both A & B pipe are atached to the tank how much time will be required to empty the tank?

    A
    `10^(1/2)` minutes
    B
    25 minutes
    C
    15 minutes
    D
    `6^(2/3)` minutes

  • A pipe can empty a tank in 40 minutes. If diameter of another emptying pipe is double that of this pipe, in how much time the pipes together can empty the tank?

    A
    20 min.
    B
    8 min.
    C
    15 min.
    D
    10 min.

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