document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=937792>Question 937792</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Ghanima can correct a stack of papers in 5 hours, and Thufir can correct them in 4 hours. How long does it take them to correct the papres together?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #571293 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=571293\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Ghanima can correct a stack of papers in 5 hours, and Thufir can correct them in 4 hours.<BR>\n" );
document.write( " How long does it take them to correct the papres together?<BR>\n" );
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document.write( "Let t = time required when working together<BR>\n" );
document.write( "let the completed job = 1 (the stack of papers)<BR>\n" );
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document.write( "Each will do a fraction of the job, the two fractions add up to 1<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%2F5 ALIGN=MIDDLE  ALT=\"t%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%2F4 ALIGN=MIDDLE  ALT=\"t%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 1<BR>\n" );
document.write( "multiply by 20,<BR>\n" );
document.write( "20*<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%2F5 ALIGN=MIDDLE  ALT=\"t%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" > + 20*<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%2F4 ALIGN=MIDDLE  ALT=\"t%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 20<BR>\n" );
document.write( " cancel out the denominators and you have<BR>\n" );
document.write( "4t + 5t = 20<BR>\n" );
document.write( "9t = 20<BR>\n" );
document.write( "t = 20/9<BR>\n" );
document.write( "t = 2.22 hrs, which is 2 + .22(60) =  about 2 hrs 13 min<BR>\n" );
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