document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1101380>Question 1101380</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the distance between towns m and m is 280km, a car and a lorry can travel from m to n. the average speed for the lorry 20km/hr less than that of the car. the lorry takes 1 hr 10 min more than the car to travel from m to n.<BR>\n" );
document.write( "a) if the speed of the lorry is x km/hr , find x?<BR>\n" );
document.write( "b) the lorry left town m at 8:15am . the car left town m later and overtook the lorry at 12:15pm. calculate the time the car left  town m.<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 #715973 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=715973\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If you only look at part (a),<BR>\n" );
document.write( "(Doing for speed of the car; not the lorry)\r<BR>\n" );
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document.write( "<PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\">\r\n" );
document.write( "                  SPEED        TIME        DISTANCE\r\n" );
document.write( "CAR               r            t            280\r\n" );
document.write( "LORRY            r-20          t+1&1/6      280\r\n" );
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document.write( "and using the given time difference,<BR>\n" );
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document.write( "                  SPEED        TIME        DISTANCE\r\n" );
document.write( "CAR               r            <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=280%2Fr ALIGN=MIDDLE  ALT=\"280%2Fr\"   DISABLED_style= \"max-width:90%; height:auto;\" >          280\r\n" );
document.write( "LORRY            r-20          <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=280%2F%28r-20%29 ALIGN=MIDDLE  ALT=\"280%2F%28r-20%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >      280\r\n" );
document.write( "Difference                     <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2B1%2F6 ALIGN=MIDDLE  ALT=\"1%2B1%2F6\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r\n" );
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document.write( "Solve for r to get the car's speed:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28280%2F%28r-20%29-280%2Fr=1%261%2F6%29 ALIGN=MIDDLE  ALT=\"highlight_green%28280%2F%28r-20%29-280%2Fr=1%261%2F6%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( "if no mistakes in algebra steps done on paper, then<BR>\n" );
document.write( "r for the Car,\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%5E2-20r-4800=0 ALIGN=MIDDLE  ALT=\"r%5E2-20r-4800=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r=%2820%2Bsqrt%28400%2B4%2A4800%29%29%2F2 ALIGN=MIDDLE  ALT=\"r=%2820%2Bsqrt%28400%2B4%2A4800%29%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r=%2820%2B2%2Asqrt%284900%29%29%2F2 ALIGN=MIDDLE  ALT=\"r=%2820%2B2%2Asqrt%284900%29%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r=10%2B70 ALIGN=MIDDLE  ALT=\"r=10%2B70\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28r=80%29 ALIGN=MIDDLE  ALT=\"highlight%28r=80%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, for the car;\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r-20=highlight%2860%29 ALIGN=MIDDLE  ALT=\"r-20=highlight%2860%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, for the lorry </SPAN>\n" );
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