Pipes and Cisterns Practice Test 1 with solutions

Question : 5 of 40

Marks: +1, -0

Two pipes can fill a tank in 10 minutes and 30 minutes respectively and a third pipe can empty the full tank in 20 minutes. If all the three pipes are opened simultaneously, the tank will be filled in:

12 minutes
10 minutes
8 minutes
6 minutes

Validate

Solution:

In 1 minute the part filled by all the three pipes =

1/{10}+1/{30}-1/{30}

1/{12}

Hence, all the three pipes will fill the tank in 12 minutes.

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