One tap can fill a cistern in 2 hours and another can empty the cistern in 3 hours. How long will they take to fill the cistern if both the taps are opened?

5 hours
6 hours
7 hours
8 hours

Correct Answer: 6 hours

Explanation:

Net filling in 1 hour = (1/2 - 1/3) = 1/6
∴ Time taken to fill the cistern = 6 hours

More Questions from Pipes and Cistern

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