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Pipes and Cistern
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 hrs
28 hrs
36 hrs
40 hrs
Correct Answer:
20 hrs
Explanation:
1/8 - 1/x = 1/10
=> x = 40 hrs
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Pipes and Cistern
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