document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=83611>Question 83611</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A pipe ca fill a pool in 9 hours. The drain can empty the pool in 12 hours. I f the drain pipe is left open, how long 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 #60124 by </B><A HREF=/tutors/aboutme.mpl?userid=dolly><B>dolly(163)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=dolly><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=60124\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Time taken to fill the pool = 9 hrs\r<BR>\n" );
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document.write( "Volume filled in 1 hr = 1/9 part of the pool\r<BR>\n" );
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document.write( "Time taken to drain = 12 hrs.\r<BR>\n" );
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document.write( "Volume drained in 1 hr = 1/12 part\r<BR>\n" );
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document.write( "When drain is left open, volume filled in 1 hr = 1/9 - 1/12\r<BR>\n" );
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document.write( "                                               = (4-3)/36\r<BR>\n" );
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document.write( "                                               = 1/36\r<BR>\n" );
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document.write( "Thus time taken to fill the pool = 36 hrs when the drain is open\r<BR>\n" );
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