document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=695718>Question 695718</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A pool takes 9 hours to full with the intake hose and 12 hours to empty with the outtake hose. if both hose are left open, how long does the pool take to full? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #428622 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=428622\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> add the rate at which the pool is filled and<BR>\n" );
document.write( "subtract the rate at which it is emptied to get<BR>\n" );
document.write( "the rate with both hoses open.<BR>\n" );
document.write( "---------------------------<BR>\n" );
document.write( "rate for intake hose = ( 1 pool filled ) / ( 9 hrs )<BR>\n" );
document.write( "rate for outtake hose = ( 1 pool emptied ) / ( 12 hrs )<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+ ALIGN=MIDDLE  ALT=\"+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = time in hrs for the pool to fill<BR>\n" );
document.write( "with both hoses open<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F9+-+1%2F12+=+1%2Ft+ ALIGN=MIDDLE  ALT=\"+1%2F9+-+1%2F12+=+1%2Ft+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply both sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+36t+ ALIGN=MIDDLE  ALT=\"+36t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4t+-+3t+=+36+ ALIGN=MIDDLE  ALT=\"+4t+-+3t+=+36+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+36+ ALIGN=MIDDLE  ALT=\"+t+=+36+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "With both hoses open, the pool is filled in 36 hours\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );