document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=916524>Question 916524</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Julia and Robert can finish a piece of work in 15 days. Julia can do the job alone in 20 days. How long would it take  Robert to do the task alone? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #556124 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=556124\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Julia and Robert can finish a piece of work in 15 days. Julia can do the job alone in 20 days. How long would it take Robert to do the task alone?<BR>\n" );
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document.write( "together rate = 1/15 job/day<BR>\n" );
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document.write( "Julia rate = 1/20 job/day<BR>\n" );
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document.write( "Robert rate = 1/x job/day<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "rate + rate = together rate<BR>\n" );
document.write( "1/x + 1/20 = 1/15<BR>\n" );
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document.write( "1/x = 1/15 - 1/20<BR>\n" );
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document.write( "1/x = (20-15)/(15*20) = 5/(15/20) = 1/60<BR>\n" );
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document.write( "x = 60 days (time for Robert to do the job alone)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "================= </SPAN>\n" );
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