document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=696746>Question 696746</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Three pipes can fill a pool in eight hours.A drain can empty the fill pool in twelve hours.How many hours will it take to fill a quarter of the fool if the three pipes and drain open?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #429275 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=429275\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Three pipes can fill a pool in eight hours.A drain can empty the fill pool in twelve hours.How many hours will it take to fill a quarter of the fool if the three pipes and drain open? <BR>\n" );
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document.write( "3-pipe rate: 1/8 job/hr<BR>\n" );
document.write( "Drain rate: 1/1/12 job/hr<BR>\n" );
document.write( "Together rate: 1/x job/hr<BR>\n" );
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document.write( "rate - rate = together rate<BR>\n" );
document.write( "1/8 - 1/12 = 1/x<BR>\n" );
document.write( "12x - 8x = 8*12<BR>\n" );
document.write( "4x = 8*12<BR>\n" );
document.write( "x = 24 hrs (time to fill the pool together)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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