document.write( "Question 1120279: a pipe can fill a pool in 9 hours, while a drain can empty it in 15 hours. if the pipe and drain were both opened at 12 noon, then at what time will the pool be filled? \n" ); document.write( "
Algebra.Com's Answer #735952 by Shin123(626)\"\" \"About 
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The pipe can fill 1/9 of the pool in a hour and the drain can “fill” -1/15 of the pool in a hour.\r
\n" ); document.write( "\n" ); document.write( "\"1%2F9-1%2F15\"\r
\n" ); document.write( "\n" ); document.write( "\"5%2F45-3%2F45=2%2F45\" The pipe and the drain can fill 2/45 of the pool in a hour.\r
\n" ); document.write( "\n" ); document.write( "\"1%2F%282%2F45%29=45%2F2=22%261%2F2\" 10:30 AM the next day, the pool will be full.
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