document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=250779>Question 250779</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two trains, 45 km away from each other, running on parallel railroad tracks, approach each other traveling at constant speed of 12 m/s and 18 m/s respectively. How long will it take before the trains meet? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #184633 by </B><A HREF=/tutors/aboutme.mpl?userid=drk><B>drk(1908)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=drk><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=184633\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This your classic RTD problem. Let's set up the rtd table. First notice that the units of length are not the same 45 km = 45,000 m\r<BR>\n" );
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document.write( "label . . . rate . . . time . . . distance<BR>\n" );
document.write( "T1 . . . . 12 . . . . t . . . . . 12t<BR>\n" );
document.write( "T2 . . . . 18 . . . . t . . . . . 18t<BR>\n" );
document.write( "total . . . . . . . . 2t . . . . .45000\r<BR>\n" );
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document.write( "Now 30t = 45,000 - - > t = 15,000 sec = 250 minutes or 4hr 10 min. </SPAN>\n" );
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