document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=801832>Question 801832</A>: <I><SPAN STYLE=\"word-break: break-all;\"> John can do a job in 4 hours and Mark can do the same job in 2 hours. If they work together, how long will the job take? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #483679 by </B><A HREF=/tutors/aboutme.mpl?userid=Cromlix><B>Cromlix(4381)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Cromlix><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=Cromlix><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=483679\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> John can do a job in 4 hours<BR>\n" );
document.write( "Mark can do the same job in 2 hours<BR>\n" );
document.write( "How long will the job take if they<BR>\n" );
document.write( "work together?<BR>\n" );
document.write( "John's rate = 1/4 job/hr<BR>\n" );
document.write( "Mark's rate = 1/2 job/hr<BR>\n" );
document.write( "Together rate = 1/x<BR>\n" );
document.write( "1/4 + 1/2 = 1/x<BR>\n" );
document.write( "Common denominator = 4x<BR>\n" );
document.write( "x + 2x = 4<BR>\n" );
document.write( "3x = 4<BR>\n" );
document.write( "x = 4/3 or 1 1/3 hours<BR>\n" );
document.write( "1/3 of an hour = 20 minutes<BR>\n" );
document.write( "1 1/3 = 1 hour 20 minutes.<BR>\n" );
document.write( "Hope this helps.<BR>\n" );
document.write( ":-) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );