Pipes and Cisterns Practice Test 1 with solutions

Question : 17 of 40

Marks: +1, -0

A tap can fill a tank in 12 hours, whereas another can empty it in 18 hours. If both the taps are opened simultaneously, how much time will the tank take to fill?

36 hours
72 hours
18 hours
12 hours

Validate

Solution:

In 1 hour the part filled by both the taps =

1/{12}-1/{18}

1/{36}

Hence, both the taps can fill the tank in 36 hours.

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