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Two taps can fill a cistern in 10 hours in 8 hours respectively a third tapthat can empty it in 15 hours how long will it take to fill the empty cistern ifall of them are opened together? |
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Answer» Two taps can fill a cistern in 10 hours in 8 hours respectively a third tapthat can empty it in 15 hours how long will it take to fill the empty cistern ifall of them are opened together? |
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