It takes an inlet pipe of a small swimming pool 20 minutes less to fill the pool than it takes an outlet pipe of the same pool t
o empty it. through an error, starting with an empty pool, both pipes are left open and the pool is filled after 4 hours. how long does it take the inlet pipe to fill the pool and how long does it take the outlet pipe to empty it?
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Answer:
The solution is given in the attachments.\
