document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=129954>Question 129954</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A worker can build a fence in 16 hours. With the help of an assistant, the fence can be built in 9 hours. How long should it take the assistant, working alone, to build the fence? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #94911 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=94911\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a ALIGN=MIDDLE  ALT=\"a\"   DISABLED_style= \"max-width:90%; height:auto;\" > = assistant's time to build fence<BR>\n" );
document.write( "In words:<BR>\n" );
document.write( "(1 fence)/(worker's time) + (1 fence)/ (assitant's time) =<BR>\n" );
document.write( "(1 fence) / (time for both working together)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F16+%2B+1%2Fa+=+1%2F9 ALIGN=MIDDLE  ALT=\"1%2F16+%2B+1%2Fa+=+1%2F9\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "multiply both sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9%2A16%2Aa ALIGN=MIDDLE  ALT=\"9%2A16%2Aa\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9a+%2B+9%2A16+=+16a ALIGN=MIDDLE  ALT=\"9a+%2B+9%2A16+=+16a\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9a+%2B+144+=+16a ALIGN=MIDDLE  ALT=\"9a+%2B+144+=+16a\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7a+=+144 ALIGN=MIDDLE  ALT=\"7a+=+144\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+=+20.57 ALIGN=MIDDLE  ALT=\"a+=+20.57\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "It takes the assistant 20 hrs and 34 minutes approximately </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );