document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1173899>Question 1173899</A>: <I><SPAN STYLE=\"word-break: break-all;\"> One technician can wire a security alarm in 12 h, whereas it takes 10 h for a second technician to do the same job. After working alone for 6 h, the first technician quits. How long will it take the second technician to complete the wiring? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #799211 by </B><A HREF=/tutors/aboutme.mpl?userid=htmentor><B>htmentor(1343)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=htmentor><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=htmentor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=799211\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The work rate of technician 1, r1 = 1 alarm/12 hr = 1/12 (alarm/hr)<BR>\n" );
document.write( "The work rate of technician 2, r2 = 1/10 = 1/10 (alarm/hr)<BR>\n" );
document.write( "If technician 1 works 6 hr, he will complete 1/12*6 = 1/2 of the alarm<BR>\n" );
document.write( "So technician 2 will take (1/2)/(1/10) = 5 hrs to complete the alarm wiring<BR>\n" );
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