document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1026600>Question 1026600</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If joe can wash one car in four hours and Sam can wash one in six hours, how long would it take them to wash twenty cars?\r<BR>\n" );
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document.write( "The answer I am told is 48, but I think that it is 100, because if they each wash ten, then jor will take fourty hours and Sam will take sixty. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #641860 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=641860\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find out how long it will take them both<BR>\n" );
document.write( "to was 1 car. It will take 20 times longer<BR>\n" );
document.write( "to wash 20 cars<BR>\n" );
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document.write( "Joe's rate of working:<BR>\n" );
document.write( "[  1 car washed ] / [ 4 hrs ]<BR>\n" );
document.write( "Sam's rate of working:<BR>\n" );
document.write( "[ 1 car washed ] / [ 6 hrs ]<BR>\n" );
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document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+ ALIGN=MIDDLE  ALT=\"+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = time in hrs for them to<BR>\n" );
document.write( "wash 1 car working together<BR>\n" );
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document.write( "Add their rates of working to get their rate working together<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F4+%2B+1%2F6+=+1%2Ft+ ALIGN=MIDDLE  ALT=\"+1%2F4+%2B+1%2F6+=+1%2Ft+\"   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=+12t+ ALIGN=MIDDLE  ALT=\"+12t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3t+%2B+2t+=+12+ ALIGN=MIDDLE  ALT=\"+3t+%2B+2t+=+12+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+5t+=+12+ ALIGN=MIDDLE  ALT=\"+5t+=+12+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+12%2F5+ ALIGN=MIDDLE  ALT=\"+t+=+12%2F5+\"   DISABLED_style= \"max-width:90%; height:auto;\" > hrs to wash 1 car working together<BR>\n" );
document.write( "Now multiply by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+20+ ALIGN=MIDDLE  ALT=\"+20+\"   DISABLED_style= \"max-width:90%; height:auto;\" > for 20 cars<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+20%2A%28+12%2F5+%29+=+48+ ALIGN=MIDDLE  ALT=\"+20%2A%28+12%2F5+%29+=+48+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Working together, it will take them 48 hrs<BR>\n" );
document.write( "to wash 20 cars<BR>\n" );
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document.write( "A good rule to remember is that, working together, it<BR>\n" );
document.write( "always takes less time than the fastest of the<BR>\n" );
document.write( "2 workers\r<BR>\n" );
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document.write( "  </SPAN>\n" );
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