document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=229669>Question 229669</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An express train travels 90 km per hour from A to B.  A local train takes 2.5 hours longer to travel the same distance at 50 km per hour.  How far apart are A and B?  I know the answer is 281.25 but how is the problem set up?   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #170267 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=170267\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> An express train travels 90 km per hour from A to B.<BR>\n" );
document.write( " A local train takes 2.5 hours longer to travel the same distance at 50 km per hour. <BR>\n" );
document.write( "How far apart are A and B? <BR>\n" );
document.write( ":<BR>\n" );
document.write( "Let d = dist from A to B<BR>\n" );
document.write( ";<BR>\n" );
document.write( "Write a time equation: Time = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=dist%2Fspeed ALIGN=MIDDLE  ALT=\"dist%2Fspeed\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ":<BR>\n" );
document.write( "Slow train time = Fast train time + 2.5 hrs<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2F50 ALIGN=MIDDLE  ALT=\"d%2F50\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2F90 ALIGN=MIDDLE  ALT=\"d%2F90\"   DISABLED_style= \"max-width:90%; height:auto;\" > + 2.5<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Multiply equation by 450 to get rid of the denominators, results<BR>\n" );
document.write( "9d = 5d + 2.5(450)<BR>\n" );
document.write( "9d - 5d = 1125<BR>\n" );
document.write( "4d = 1125<BR>\n" );
document.write( "d = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1125%2F4 ALIGN=MIDDLE  ALT=\"1125%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "d = 281.25 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );