document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1131119>Question 1131119</A>: <I><SPAN STYLE=\"word-break: break-all;\"> \"At noon, a pump is turned on to fill an empty pool. Normally, the pump would fill the pool in 12 hours, but at 12:00 P.M, a valve is accidentally opened that could drain a full pool in 20 hours. If the valve remains open, at what time will the pool be full?\"\r<BR>\n" );
document.write( "\n" );
document.write( "This was a question I had on my Algebra 2 test and I got punched in the face with this question..., I wasn't able to fill in the chart at all, but if I'm right the chart should be a rate x time = distance (work) chart. I really have no idea how to fill in the chart... </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #747729 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=747729\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  \"At noon, a pump is turned on to fill an empty pool. Normally, the pump would fill the pool in 12 hours, but at 12:00 P.M, a valve is accidentally opened that could drain a full pool in 20 hours. If the valve remains open, at what time will the pool be full?\"<BR>\n" );
document.write( "----<BR>\n" );
document.write( "1st pump data:<BR>\n" );
document.write( "rate = 1/12 pool/hr<BR>\n" );
document.write( "----<BR>\n" );
document.write( "2nd pump data:<BR>\n" );
document.write( "rate = -1/20 pool/hr<BR>\n" );
document.write( "------<BR>\n" );
document.write( "Rate at which the pool is filled if both are pumps are open:: 1/12 - 1/20<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "Let the time to fill the pool be x-hours.<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "x(1/12 - 1/20) = 1 pool<BR>\n" );
document.write( "x((20-12)/(12*20)) = 1<BR>\n" );
document.write( "x(8/240) = 1<BR>\n" );
document.write( "x(1/30) = 1<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "Ans:: Time to fill the pool = 30 hours.<BR>\n" );
document.write( "---------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "----------<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );