document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=146759>Question 146759</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Cleaning Sidewalks.  Edgar can blow the leaves off the sidewalks around the capitol building in 2 hours using a gasoline-powered blower.  Ellen can do the same job in 8 hours using a broom.  How long would it take them working together?   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #107172 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=107172\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> It's obvious you can't add the times, since 2 working would take less time.  You have to look at the inverse.<BR>\n" );
document.write( "Edgar can do 1 walk/2 hours, and Ellen can do 1 walk/8 hours.  Add 1/2 and 1/8 to get 5/8.  Then invert that, = 8/5.<BR>\n" );
document.write( "Together it takes 1.6 hours, less than either of them separately.  (Unless they yak too much, or spend time not working.) </SPAN>\n" );
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