document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=670855>Question 670855</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If an old guy does a job in 60 hours and an old guy and a new guy does a job in 15 hours, how long does the new guy do it himself? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #417152 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=417152\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If an old guy does a job in 60 hours and an old guy and a new guy does a job in 15 hours, how long does the new guy do it himself?<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "old guy rate= 1/60 job/hr<BR>\n" );
document.write( "new guy rate= 1/x job/hr<BR>\n" );
document.write( "Together rate= 1/15 job/hr<BR>\n" );
document.write( "------------<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "rate + rate = together rate<BR>\n" );
document.write( "1/60 + 1/x = 1/15<BR>\n" );
document.write( "x + 60 = 4x<BR>\n" );
document.write( "3x = 60<BR>\n" );
document.write( "x = 20 hrs (time for the new guy to do the job alone)<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" );