document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1173832>Question 1173832</A>: <I><SPAN STYLE=\"word-break: break-all;\"> It takes Doug 3 days to reroof a house. If Doug's son helps him, the job can be completed in 2 days. How long would it take Doug's son, working alone, to do the job? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #799168 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13198)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=799168\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "The other tutor showed a typical algebraic solution, using the fraction of the job that each worker completes in a day.<br><BR>\n" );
document.write( "Here is a quick informal solution, if formal algebra is not required.<br><BR>\n" );
document.write( "Doug can do the job alone in 3 days, so when he and his son complete the job together in 2 days, Doug does 2/3 of the job.<BR>\n" );
document.write( "That means his son does 1/3 of the job in those 2 days.<BR>\n" );
document.write( "And that means his son would take 2*3=6 days to do the job alone.<br><BR>\n" );
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