document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=349097>Question 349097</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If it takes one worker 20 hours to roof a house and another 25 hours how long will it take them to work together? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #249520 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16949)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=249520\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> one worker 20 hours<BR>\n" );
document.write( "1/20 of the job he will do in 1 hour<BR>\n" );
document.write( "another worker 25 hours to do the job<BR>\n" );
document.write( "1/25 of the job in 1 hour<BR>\n" );
document.write( "...<BR>\n" );
document.write( "Together they will do 1/20 + 1/25 of the job in 1 hour<BR>\n" );
document.write( "LCD = 100<BR>\n" );
document.write( "5+4 / 100 <BR>\n" );
document.write( "9/100 of the job in 1 hour.<BR>\n" );
document.write( "they will take 100 /9 hours to do the job.<BR>\n" );
document.write( "=11.1 hours </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );