Pipes and Cisterns Practice Test 2 with solutions

Question : 38 of 40

Marks: +1, -0

A bath tub is connected with an inlet and an outlet. An inlet can fill the bath tub in 9 minutes and the outlet can empty it in 12 minutes. If both the inlet and outlet are opened simultaneously, time taken to fill the tub is:

32 minutes
25 minutes
36 minutes
30 minutes
None of the above

Validate

Solution:

Part of tub filled by both in 1 minute
=

1/9 - 1/{12}

{4-3}/{36}

1/{36}

So, together they will fill the tub in 36 minutes.

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