document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=106504>Question 106504</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Over a distance of 120 km, the average speed of a train is 40km/h faster than that of a car. If the train covers the distance in 30min less time, find its average speed.\r<BR>\n" );
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document.write( "an equation for this pls?\r<BR>\n" );
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document.write( "thanks =D </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #77580 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=77580\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let x=\"speed of train\"\r<BR>\n" );
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document.write( "from car ... t=d/r ... t=120/(x-40)\r<BR>\n" );
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document.write( "from train ... r=d/t ... x=120/((120/(x-40))-30) </SPAN>\n" );
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