document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=596620>Question 596620</A>: <I><SPAN STYLE=\"word-break: break-all;\"> it takes 6 hrs longer to empty swimming pool than it does to fill it<BR>\n" );
document.write( "if you accidentally leave the drain open it wil take 120hrs to fill pool<BR>\n" );
document.write( "how long would it take if you remember to close the drain.? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #377820 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=377820\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> it takes 6 hrs longer to empty swimming pool than it does to fill it<BR>\n" );
document.write( "if you accidentally leave the drain open it wil take 120hrs to fill pool<BR>\n" );
document.write( "how long would it take if you remember to close the drain.?<BR>\n" );
document.write( "**<BR>\n" );
document.write( "let x=hrs to fill pool with drain closed<BR>\n" );
document.write( "work rate: 1/x<BR>\n" );
document.write( "x+6= hrs to drain filled pool<BR>\n" );
document.write( "work rate: 1/(x+6)<BR>\n" );
document.write( "time*fill rate-time*drain rate=1 (100% of pool filled)<BR>\n" );
document.write( "120/x-120/(x+6)=1<BR>\n" );
document.write( "LCD: x(x+6)<BR>\n" );
document.write( "120x+7200-120x=x^2+6x<BR>\n" );
document.write( "x^2+6x-7200=0<BR>\n" );
document.write( "solve by following quadratic formula:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ ALIGN=MIDDLE  ALT=\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "a=1, b=6, c=-7200<BR>\n" );
document.write( "x&#8776;81.91<BR>\n" );
document.write( "or<BR>\n" );
document.write( "x&#8776;-87.91(reject, x>0)<BR>\n" );
document.write( "ans:<BR>\n" );
document.write( "If you remember to close the drain, it would take about 82 hours to fill the pool\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
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