document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=393524>Question 393524</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Computer A can do a job in 4 hours. Computer B can do the same job in 2 hours. How long will it take them to complete the job working together? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #279267 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=279267\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Computer A can do a job in 4 hours. Computer B can do the same job in 2 hours. How long will it take them to complete the job working together?<BR>\n" );
document.write( "-------------<BR>\n" );
document.write( "A rate = 1/4 job/hr<BR>\n" );
document.write( "B rate = 1/2 job/hr<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Together rate: 1/x job/hr<BR>\n" );
document.write( "-----------------------------<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "rate + rate = together rate<BR>\n" );
document.write( "1/4 + 1/2 = 1/x<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Multiply thru by 4x to get:<BR>\n" );
document.write( "x + 2x = 4<BR>\n" );
document.write( "3x = 4<BR>\n" );
document.write( "x = 4/3 = 1hr and 20 min (time to do the job together)<BR>\n" );
document.write( "====================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "=============== </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );