document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1137731>Question 1137731</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello Tutors!  I would be elated if someone can help me break down and solve this math riddle.  It is worth points (and I am in desperate need).  Thank you in advance for your time and patience.  I struggle terribly with algebra.\r<BR>\n" );
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document.write( "If a vat of acid can be filled by an inlet pipe in 10 hr and emptied by an outlet pipe in 20 hr, how long will it take to fill the vat if both pipes are open? Assume that the vat is empty at the start.<BR>\n" );
document.write( "Hint: This is essentially a variation of a distance - rate - time problem. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #755599 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39618)</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=755599\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Fill Rate of Inlet, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F10 ALIGN=MIDDLE  ALT=\"1%2F10\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Fill Rate of Outlet, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-1%2F20 ALIGN=MIDDLE  ALT=\"-1%2F20\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "(Outlet drains the vat; it does not fill the vat.)\r<BR>\n" );
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document.write( "Both Pipes at the same time:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F10%2B%28-1%2F20%29 ALIGN=MIDDLE  ALT=\"1%2F10%2B%28-1%2F20%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F10-1%2F20 ALIGN=MIDDLE  ALT=\"1%2F10-1%2F20\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2F20-1%2F20 ALIGN=MIDDLE  ALT=\"2%2F20-1%2F20\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F20 ALIGN=MIDDLE  ALT=\"1%2F20\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "20 hours to fill, both pipes open </SPAN>\n" );
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