Pipes and Cisterns Practice Test 1 with solutions

Question : 1 of 40

Marks: +1, -0

Two pipes P and Q can fill a tank in

5 5/{12}

and

9 2/7

minutes respectively. A waste pipe ‘R’ can empty it in

10 5/6

minutes. If all the three pipes are opened simultaneously, the time taken to fill the tank is:

Solution:

Part of the tank filled by all the three pipes in 1 minute =

{12}/{65}+7/{62}-6/{65}

{12+7-6}/{65}

{13}/{65}

1/5

So, together the tank will be filled in 5 minutes.

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