document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=191310>Question 191310</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780073533490/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Filling a tank. A water tank has an inlet pipe and a drain<BR>\n" );
document.write( "pipe. A full tank can be emptied in 30 minutes if the drain<BR>\n" );
document.write( "is opened and an empty tank can be filled in 45 minutes<BR>\n" );
document.write( "with the inlet pipe opened. If both pipes are accidentally<BR>\n" );
document.write( "opened when the tank is full, then how long will it take to<BR>\n" );
document.write( "empty the tank? <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #143600 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=143600\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the size of the tank is not a factor<BR>\n" );
document.write( "so let's assume a size that's divisible by 30 and 45 ___ 90gal is good\r<BR>\n" );
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document.write( "the outlet passes 90gal in 30min or 3gal/min\r<BR>\n" );
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document.write( "the inlet passes 90gal in 45min or 2gal/min\r<BR>\n" );
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document.write( "with both open, the tank is losing 1gal/min (3-2)\r<BR>\n" );
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document.write( "emptying a 90gal tank at 1gal/min takes 90min </SPAN>\n" );
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