A pool can be filled in 4 hours and drained in 5 hours. The valve that fills the pool was opened at 1:00 pm and some time later the drain that empties the pool was also opened. If the pool was filled by 11:00 pm and not earlier, when was the drain opened?
at 2:00 pm
at 2:30 pm
at 3:00 pm
at 3:30 pm
at 4:00 pm
Pool filled and drained - PS
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Pool filled and drained - PS
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Re: Pool filled and drained - PS
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