document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=161735>Question 161735</A>: <I><SPAN STYLE=\"word-break: break-all;\"> person A can fill a tank in 10 minutes<BR>\n" );
document.write( "person B can fill a tank in 20 minutes<BR>\n" );
document.write( "person C can fill a tank in 30 minutes\r<BR>\n" );
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document.write( "how long will it take to fill the tank if they all work together?<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 #119325 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=119325\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  person A can fill a tank in 10 minutes<BR>\n" );
document.write( "person B can fill a tank in 20 minutes<BR>\n" );
document.write( "person C can fill a tank in 30 minutes <BR>\n" );
document.write( "how long will it take to fill the tank if they all work together?<BR>\n" );
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document.write( "Add the reciprocals, then invert it.<BR>\n" );
document.write( "1/10 + 1/20 + 1/30 = 11/60<BR>\n" );
document.write( "The time is 60/11 minutes, or 5 5/11 minutes. </SPAN>\n" );
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