document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=330519>Question 330519</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Jack can mow a lawn in 5hrs. Mary can more the same lawn in 4 hrs. How long will it take for them to mow the same lawn together. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #236917 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</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=236917\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Jack takes 5 hours<BR>\n" );
document.write( "so he can do 1/5 of the job in 1 hour<BR>\n" );
document.write( ",,<BR>\n" );
document.write( "Mary can do it in 4 hours<BR>\n" );
document.write( "so she does 1/4 of the job in 1 hour<BR>\n" );
document.write( "..<BR>\n" );
document.write( "Together they will do 1/5  + 1/4 of the job in 1 hour.<BR>\n" );
document.write( "LCD = 20<BR>\n" );
document.write( "4+5  / 20<BR>\n" );
document.write( "=9/20 of the job in 1 hour<BR>\n" );
document.write( "..<BR>\n" );
document.write( "they will take 20 / 9 hours to do the job<BR>\n" );
document.write( "=2.22 hours </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );