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Two tubes P and Q can fill a reservoir in 18 minutes and 22.5 minutes respectively. If both the tubes are opened together, then after how much time Q should be closed so that the reservoir is full in 13.5 minutes? |
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Answer» Two tubes P and Q can fill a reservoir in 18 minutes and 22.5 minutes respectively. If both the tubes are opened together, then after how much time Q should be closed so that the reservoir is full in 13.5 minutes? |
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