document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=741372>Question 741372</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Kyle can build a fence in 3 hours. Kenneth can build a fence in 4 hours. If they work together, how long will it take them to build a fence?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #451984 by </B><A HREF=/tutors/aboutme.mpl?userid=htmentor><B>htmentor(1343)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=htmentor><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=htmentor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=451984\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Kyle can build a fence in 3 hours. Kenneth can build a fence in 4 hours. If they work together, how long will it take them to build a fence?<BR>\n" );
document.write( "=======================<BR>\n" );
document.write( "Kyle's build rate = 1 fence per 3 hours = 1/3 fences per hour<BR>\n" );
document.write( "Ken's build rate = 1 fence per 4 hours = 1/4 fences per hour<BR>\n" );
document.write( "Working together, their combined rate is 1/3 + 1/4 = 7/12 fences per hour<BR>\n" );
document.write( "So it takes them 12/7 = 1 5/7 hours per fence<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );