document.write( "Question 903596: Two inlet pipes can fill an empty swimming pool in 3 days and 6 days, respectively. A pump can empty a full pool in 4 days. How long will it take to fill the empty pool if both pipes are open and the pump is on? \n" ); document.write( "

Algebra.Com's Answer #548183 by richwmiller(17219) $\"\"$ $\"About$

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1/x+1/y=1/p
\n" ); document.write( "1/3+1/6=1/p
\n" ); document.write( "2/6+1/6=1/p
\n" ); document.write( "3/6=1/p
\n" ); document.write( "1/2=1/p
\n" ); document.write( "p=2 days with just the inlets open\r
\n" ); document.write( "\n" ); document.write( "1/3+1/6-1/4=1/p
\n" ); document.write( "4/12+2/12-3/12=1/p\r
\n" ); document.write( "\n" ); document.write( "3/12=1/p
\n" ); document.write( "1/4=1/p
\n" ); document.write( "p=4 days with the inlets and the pump open\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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