Question
Pipes P and Q can fill a tank in 10 hours and 20 hours respectively, while pipe C can empty the full tank in 30 hours. If all the three pipes are opened together at 6
Pipes P and Q can fill a tank in 10 hours and 20 hours respectively, while pipe C can empty the full tank in 30 hours. If all the three pipes are opened together at 6
a.m., then at what time will 70% of the tank be filled?
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