document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=965451>Question 965451</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An inlet pipe on a swimming pool can be used to fill the pool in<BR>\n" );
document.write( "6 hours. The drain pipe can be used to empty the pool in<BR>\n" );
document.write( "12 hours. If the pool is<BR>\n" );
document.write( "14 filled and then the inlet pipe and drain pipe are opened, how long from that time will it take to fill the pool?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #590138 by </B><A HREF=/tutors/aboutme.mpl?userid=macston><B>macston(5194)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=macston><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=macston><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=590138\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "The inlet fills 1 pool /6 hours=(1/6) pool/hr<BR>\n" );
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document.write( "The drain empties -1 pool /12 hours=-(1/12) pool/hour<BR>\n" );
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document.write( "Net change with both open=+(1/6) pool/hr-(1/12) pool/hr=+(1/12) pool/hr<BR>\n" );
document.write( "With both open. the pool fills at a rate of 1/12 pool/hr.<BR>\n" );
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document.write( "If the pool is 1/4 (3/12) full, that leaves ((1)-(3/12)=9/12) 9/12 pool to fill, at a rate of 1/12 pool/hr it will take 9 hours.<BR>\n" );
document.write( "ANSWER: With both pipes open, it takes 9 hours to fill 3/4 of the pool. <BR>\n" );
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