document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1157>Question 1157</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two trains, one 500 meters long and the other 1000 meters long, are traveling in opposite directions on parallel tracks.  The first train is traveling at 100km/h and the other at 80km/h.  How long will it take for the trains to pass each other from the moment the locomotives are at the same point?\r<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 #535543 by </B><A HREF=/tutors/aboutme.mpl?userid=ohthatstheanswer><B>ohthatstheanswer(1)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ohthatstheanswer><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=535543\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ||||||||--}|||||<BR>\n" );
document.write( "|||||||||||{---- are the trains at the moment they are at the same point.<BR>\n" );
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document.write( "{----||||||||||| are the trains after passing each other.<BR>\n" );
document.write( "Thus, the distance for the two trains to pass each other completely is 500m + 1000m = 1.5km <BR>\n" );
document.write( "(d)istance = (v)elocity x (t)ime<BR>\n" );
document.write( "Thus, the time required for the trains to pass each other is t = d / v =<BR>\n" );
document.write( "-> 1.5km/(100km/h + 80 km/h) = 1.5km/180km/hr<BR>\n" );
document.write( "-> km cancels out -> convert to min<BR>\n" );
document.write( "-> (1.5 x 60min/hr)/180/hr <BR>\n" );
document.write( "-> hr cancels out<BR>\n" );
document.write( "-> 90min/180<BR>\n" );
document.write( "-> 1min/2 = 30s to completely pass each other </SPAN>\n" );
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