document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=774651>Question 774651</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If a pipe takes 8hours to fill a tank..... <BR>\n" );
document.write( "And another pipe takes 4 hours to empty the tank....<BR>\n" );
document.write( "When both of the pipes are on....how much time will it take to fill the tank????.. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #472420 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39623)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=472420\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The rates are additive when both pipes are fully open at the same time.\r<BR>\n" );
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document.write( "Filling pipe, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F8 ALIGN=MIDDLE  ALT=\"1%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" > tank per hour<BR>\n" );
document.write( "Emptying pipe, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-1%2F4 ALIGN=MIDDLE  ALT=\"-1%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" > tank per hour\r<BR>\n" );
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document.write( "Combined Rate, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281%2F8-1%2F4%29 ALIGN=MIDDLE  ALT=\"%281%2F8-1%2F4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > tank per hour.  Notice very carefully that rate of filling is smaller than the rate of emptying.  YOU CANNOT FILL THIS TANK WHEN BOTH PIPES ARE OPEN!!\r<BR>\n" );
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document.write( "Simplify to <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F8-2%2F8=highlight%28-1%2F8%29 ALIGN=MIDDLE  ALT=\"1%2F8-2%2F8=highlight%28-1%2F8%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > tank/hour.<BR>\n" );
document.write( "This tank will never fill when both pipes are open all the way. </SPAN>\n" );
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