document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1064559>Question 1064559</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Machine A can do a certain job in 8 hours. machine B can do the same job in 10 hours. machine C can do the same job in 12 hours. all three machines start the job at 9.00 am, machine B breaks down at 11.00am and the other two machines finish the job. approximately at what time would the job be completed? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #679627 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=679627\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Machine A can do a certain job in 8 hours. machine B can do the same job in 10 hours. machine C can do the same job in 12 hours. all three machines start the job at 9.00 am, machine B breaks down at 11.00am and the other two machines finish the job. approximately at what time would the job be completed? <BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "A time = 8 hrs/job ; A rate = 1/8 job/hr<BR>\n" );
document.write( "B time = 10 hrs/job ; B rate = 1/10 job/hr<BR>\n" );
document.write( "C time = 12 hrs/job ; C rate = 1/12 job/hr<BR>\n" );
document.write( "------<BR>\n" );
document.write( "Equations:<BR>\n" );
document.write( "Let x be the hours to do the job::<BR>\n" );
document.write( "work + work + work = 1 job<BR>\n" );
document.write( "(1/8)x + 2(1/10) + (1/12)x = 1 job<BR>\n" );
document.write( "-----------<BR>\n" );
document.write( "Multiply thru by 120 to get:<BR>\n" );
document.write( "15x + 24 + 10x = 120<BR>\n" );
document.write( "25x = 96<BR>\n" );
document.write( "x = 3.84 hrs = 3hrs 50 min 24 seconds<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "------------------- </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );