document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=715478>Question 715478</A>: <I><SPAN STYLE=\"word-break: break-all;\"> It take Amy 12 minutes to sweep a porch. Arjun can sweep the same porch in 13 minutes. If they worked together how long would it take them?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #439446 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=439446\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> It take Amy 12 minutes to sweep a porch. Arjun can sweep the same porch in 13 minutes. If they worked together how long would it take them? <BR>\n" );
document.write( "----------<BR>\n" );
document.write( "Amy rate: 1/12 job/min<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Arjun rate: 1/13 job/min<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Together rate: 1/x job/min<BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "1/12 + 1/13 = 1/x<BR>\n" );
document.write( "----<BR>\n" );
document.write( "13x + 12x = 12*13<BR>\n" );
document.write( "25x = 156<BR>\n" );
document.write( "x = 6.24 minutes = 6 min 14.4 seconds (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" );