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**Unformatted text preview: **Evening Quiz #5 Solution
Mean: 10, High: 10, Low: 10
(9 Points) 1. Two pipes can be used to fill a swimming pool. When
the first pipe is closed, the second pipe can fill the pool in 9 hours.
When the second pipe is closed, the first pipe can fill the pool in 7
hours. How long will it take to fill the pool if both pipes are open? ( ) ( ) ( ) ( ) () Working together, it should take the two pipes
or 3 hours, 56 minutes and 15 seconds. hours to fill the pool, ...

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