document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=323473>Question 323473</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Working alone, Ryan can dig a 10 ft by 10 ft<BR>\n" );
document.write( "hole in five hours. Castel can dig the same<BR>\n" );
document.write( "hole in six hours. How long would it take<BR>\n" );
document.write( "them if they worked together?\r<BR>\n" );
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document.write( "I tried several ways to solve it but I can't seem to get the right answer.  Because the answer to the problem is not what I am getting. Please I need help?  <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 #231468 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=231468\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> It's a matter of perspective.<BR>\n" );
document.write( "Ryan digs the hole in 5 hours, which is 1/5 hole per hour.<BR>\n" );
document.write( "Castel digs it in 6 hours, which is 1/6 hole per hour.<BR>\n" );
document.write( "Together, they do the sum, 1/5 + 1/6 per hour = 11/30 holes per hour.<BR>\n" );
document.write( "11/30 hole/hour --> 30/11 hours/hole<BR>\n" );
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document.write( "Use the shortcut, product/sum<BR>\n" );
document.write( "5*6/(5+6) = 30/11<BR>\n" );
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