document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=865720>Question 865720</A>: <I><SPAN STYLE=\"word-break: break-all;\"> It takes Jimmy ten hours to dig a 10 ft by 10 ft hole. Julia can dig the same hole in eight hours. Find how long it would take them if they worked together. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #521820 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=521820\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Note: the \"10 ft by 10 ft\" portion is irrelevant. It's put in there to throw you off. So ignore it. I would rephrase the statement to be \"it takes Jimmy 10 hours to dig a single hole\". And then maybe add on \"Julia can dig the same hole, of the same volume and size, in 8 hours\"\r<BR>\n" );
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document.write( "Let,<BR>\n" );
document.write( "x = time it takes Jimmy to do the job alone<BR>\n" );
document.write( "y = time it takes Julia to do the job alone<BR>\n" );
document.write( "z = time it takes for them to get the job done when they work together\r<BR>\n" );
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document.write( "So that means,<BR>\n" );
document.write( "x = 10<BR>\n" );
document.write( "y = 8<BR>\n" );
document.write( "z = unknown (we leave it as 'z' for now). We are solving for this and isolating this variable\r<BR>\n" );
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document.write( "It will take them <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=40%2F9 ALIGN=MIDDLE  ALT=\"40%2F9\"   DISABLED_style= \"max-width:90%; height:auto;\" > hours to get the job done if they work together (Note: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=40%2F9+=+4.4444 ALIGN=MIDDLE  ALT=\"40%2F9+=+4.4444\"   DISABLED_style= \"max-width:90%; height:auto;\" > hours approximately) </SPAN>\n" );
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