document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=359042>Question 359042</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am not sure how to begin setting this equation up. I know that it requires the d=r*t formula but what goes where and how do I solve it?\r<BR>\n" );
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document.write( "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? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #256220 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=256220\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Rate*Time=Volume<BR>\n" );
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document.write( "Let the pool volume be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P ALIGN=MIDDLE  ALT=\"P\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "Calculate the fill rate,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R%5Bf%5D%2At=P ALIGN=MIDDLE  ALT=\"R%5Bf%5D%2At=P\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R%5Bf%5D%2A45=P ALIGN=MIDDLE  ALT=\"R%5Bf%5D%2A45=P\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R%5Bf%5D=P%2F45 ALIGN=MIDDLE  ALT=\"R%5Bf%5D=P%2F45\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Calculate the drain rate,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R%5Bd%5D%2At=P ALIGN=MIDDLE  ALT=\"R%5Bd%5D%2At=P\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R%5Bd%5D%2A30=P ALIGN=MIDDLE  ALT=\"R%5Bd%5D%2A30=P\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R%5Bd%5D=P%2F30 ALIGN=MIDDLE  ALT=\"R%5Bd%5D=P%2F30\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Calculate the time when both valves are open,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28R%5Bd%5D-R%5Bf%5D%29%2At=P ALIGN=MIDDLE  ALT=\"%28R%5Bd%5D-R%5Bf%5D%29%2At=P\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Substituting,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28P%2F30-P%2F45%29%2At=P ALIGN=MIDDLE  ALT=\"%28P%2F30-P%2F45%29%2At=P\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P%283%2F90-2%2F90%29%2At=P ALIGN=MIDDLE  ALT=\"P%283%2F90-2%2F90%29%2At=P\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281%2F90%29%2At=1 ALIGN=MIDDLE  ALT=\"%281%2F90%29%2At=1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28t=90%29 ALIGN=MIDDLE  ALT=\"highlight%28t=90%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >minutes<BR>\n" );
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