document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=891779>Question 891779</A>: <I><SPAN STYLE=\"word-break: break-all;\"> One pipe can fill a tank in 20 minutes, while another takes 30 minutes to fill the same tank. How long would it take the two pipes together 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 #540026 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=540026\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The rate for filling with both pipes is the sum of their rates.\r<BR>\n" );
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document.write( "Not knowing the time to fill the tank with both pipes at the same  time, you want the reciprocal for:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F20%2B1%2F30=1%2Fx ALIGN=MIDDLE  ALT=\"1%2F20%2B1%2F30=1%2Fx\"   DISABLED_style= \"max-width:90%; height:auto;\" >. </SPAN>\n" );
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