Asked by Emily
A swimming pool can be filled by a vent in 10 hours. When the pool is filled, it can be emptied bya drain pipe in 20 hours. The pool manager mistakenly leaves the drain pipe open while trying tofill the pool. How long will it take to fill the pool?
Answers
Answered by
drwls
Net rate of filling = 1/10 - 1/20 pool/hour = 1/20 pool/hour
Fill time = (1 pool)/(1/20 pool/h)
= 20 hours
Fill time = (1 pool)/(1/20 pool/h)
= 20 hours
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