Pipes and Cisterns Practice Test 1 with solutions

Question : 7 of 40

Marks: +1, -0

A cistern is normally filled in 8 hours but takes two hours longer to fill because of a leak in its bottom. If the cistern is full, the leak will empty it in:

20 hours
30 hours
40 hours
50 hours

Validate

Solution:

In 1 hour the part emptied by the leak =

1/8-1/{10}

1/{40}

Hence, the leak can empty the full cistern in 40 hours.

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