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Pipes and Cisterns Practice Test 1 with solutions

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Question : 19

Total: 40

A certain tank can be filled by pipes A and B separately in 4 and 5 minutes respectively. Whereas pipe C can empty it in 3 minutes. How long will it take to fill or empty the 4/5th full tank, if all the three pipes start together?

6
2
7
minutes to fill
2
5
7
minutes to fill
6
6
7
minutes to fill
1
5
7
minutes to fill

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