document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=760238>Question 760238</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A truck travels 240km. If it had travelled an average 10km/h faster the trip would have been 2 hours shorter. What was the actual average speed in km/h of the truck? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #462498 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=462498\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A truck travels 240km. If it had travelled an average 10km/h faster the trip would have been 2 hours shorter. What was the actual average speed in km/h of the truck?<BR>\n" );
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document.write( "d = r*t = 240 km<BR>\n" );
document.write( "t = 240/r<BR>\n" );
document.write( "t-2 = 240/(r+10)<BR>\n" );
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document.write( "(240/r)-2 = 240/(r+10)<BR>\n" );
document.write( "(240 - 2r)/r = 240/(r+10)<BR>\n" );
document.write( "240r = (240 - 2r)*(r+10)<BR>\n" );
document.write( "120r = (120 - r)*(r+10)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=120r+=+-r%5E2+%2B+110r+%2B+1200 ALIGN=MIDDLE  ALT=\"120r+=+-r%5E2+%2B+110r+%2B+1200\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%5E2+%2B+10r+-+1200+=+0 ALIGN=MIDDLE  ALT=\"r%5E2+%2B+10r+-+1200+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(r+40)*(r-30) = 0<BR>\n" );
document.write( "r = 30 km/hr<BR>\n" );
document.write( " </SPAN>\n" );
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