Filling a Pool Suppose Blake discovered his error (see Exercise 31) after an hourlong surf. If he then closed the outlet pipe, how much more time would be needed to fill the pool?
Exercise 31- Filling a Pool An inlet pipe can fill Blake’s pool in 5 hr, while an outlet pipe can empty it in 8 hr. In his haste to surf the Internet, Blake left both pipes open. How long did it take to fill the pool?
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