College Math

An inlet pipe on a swimming pool can be used to fill the pool in 24 hours. The drain pipe can be used to empty the pool in 40 hours. If the pool is one-third filled and then the drain pipe is accidentally opened, how long will it take to fill the pool?

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asked by Lamont
  1. See previous post.

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    posted by Henry
  2. This is dumb!

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    posted by Bfkfn

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