document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=98384>Question 98384</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Holly takes 50 minutes to mow the lawn. It takes erich an hour to mow the same lawn. One day Holly started mowing the lawn by herself and worked for 10 minutes. Then Erich joined her and they finished the lawn together. How long did it take them to finish mowing the lawn after Erich started to help? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #71603 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=71603\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Holly can do 1/50 of the job per minute<BR>\n" );
document.write( "Erich can do 1/60 of the job per minute<BR>\n" );
document.write( "Holly works alone for 10 min. she does 10/50 or 1/5 of the job.<BR>\n" );
document.write( "both together = 1/50+1/60=6/300+5/300=11/300 job per minute.<BR>\n" );
document.write( "t=time in minutes<BR>\n" );
document.write( "11t/300=4/5<BR>\n" );
document.write( "t=4/5*(300/11)=21 9/11minutes<BR>\n" );
document.write( "So the total time it takes is 21+10= 31 minutes and 49 seconds(9/11*60)<BR>\n" );
document.write( "Ed </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );