document.write( "Question 161551: A pump fills a pool in 4 hours. The pool can drain in 1 hour. How long will it take to fill the pool if the drain is left open? \n" ); document.write( "
Algebra.Com's Answer #119013 by Alan3354(69443)\"\" \"About 
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A pump fills a pool in 4 hours. The pool can drain in 1 hour. How long will it take to fill the pool if the drain is left open?
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\n" ); document.write( "It will never fill, since it drains 4 times as fast it fills.
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