document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=199154>Question 199154</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A train 1000 m long travels through a 3000 m tunnel. If 30 seconds elapse from the time the last car enters the tunnel until the time when the engine emerges from the other end, the speed of the train, in meters per second, is:\r<BR>\n" );
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document.write( "a 100/3  b  200/3  c  100  d 1000   e None of these </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #149642 by </B><A HREF=/tutors/aboutme.mpl?userid=Edwin+McCravy><B>Edwin McCravy(20056)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Edwin+McCravy><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=Edwin+McCravy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=149642\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font size = 8 color = \"red\"><b>Edwin's solution:</b></pre></font><BR>\n" );
document.write( "A train 1000 m long travels through a 3000 m tunnel. If 30 seconds elapse from the time the last car enters the tunnel until the time when the engine emerges from the other end, the speed of the train, in meters per second, is:\r<BR>\n" );
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document.write( "a 100/3  b  200/3  c  100  d 1000   e None of these<BR>\n" );
document.write( "<font size = 4 color = \"indigo\"><b><BR>\n" );
document.write( "Let this line be the track inside the tunnel with the<BR>\n" );
document.write( "1000, 2000, and 3000 meter markers: \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28400%2C100%2C-.1%2C3.1%2C-1%2C2%2C+locate%28.85%2C0%2C1000%29%2C%0D%0Aline%281%2C-.2%2C1%2C.2%29%2Cline%282%2C-.2%2C2%2C.2%29%2Cline%283%2C-.2%2C3%2C.2%29%2C%0D%0Aline%280%2C-.2%2C0%2C.2%29%2C+locate%282.85%2C0%2C3000%29%2Clocate%28-.03%2C0%2C0%29%2C%0D%0A+locate%281.85%2C0%2C2000%29%2C+line%280%2C0%2C3%2C0%29+%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Put the train just inside the tunnel, with the engine<BR>\n" );
document.write( "at the 1000 meter marker, and the last car at the 0<BR>\n" );
document.write( "meter marker, the left end of the tunnel.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28400%2C100%2C-.1%2C3.1%2C-1%2C2%2C+locate%28.85%2C0%2C1000%29%2C%0D%0Aline%281%2C-.2%2C1%2C.2%29%2Cline%282%2C-.2%2C2%2C.2%29%2Cline%283%2C-.2%2C3%2C.2%29%2C%0D%0Aline%280%2C-.2%2C0%2C.2%29%2C+locate%282.85%2C0%2C3000%29%2Clocate%28-.03%2C0%2C0%29%2C%0D%0A+locate%281.85%2C0%2C2000%29%2C+line%280%2C0%2C3%2C0%29%2Crectangle%280%2C0%2C1%2C.5%29++%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Now when the engine is at the 3000 meter marker which<BR>\n" );
document.write( "is the right end of the tunnel, we have this:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28400%2C100%2C-.1%2C3.1%2C-1%2C2%2C+locate%28.85%2C0%2C1000%29%2C%0D%0Aline%281%2C-.2%2C1%2C.2%29%2Cline%282%2C-.2%2C2%2C.2%29%2Cline%283%2C-.2%2C3%2C.2%29%2C%0D%0Aline%280%2C-.2%2C0%2C.2%29%2C+locate%282.85%2C0%2C3000%29%2Clocate%28-.03%2C0%2C0%29%2C%0D%0A+locate%281.85%2C0%2C2000%29%2C+line%280%2C0%2C3%2C0%29%2Crectangle%282%2C0%2C3%2C.5%29++%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "So the engine only traveled 2000 meters, from<BR>\n" );
document.write( "the 1000 meter marker to the 3000 meter marker,\r<BR>\n" );
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document.write( "So the engine has traveled 2000 meters.\r<BR>\n" );
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document.write( "Since <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=RATE=DISTANCE%2FTIME ALIGN=MIDDLE  ALT=\"RATE=DISTANCE%2FTIME\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=RATE=%282000m%29%2F%2830s%29=%28200m%29%2F%283s%29=200%2F3 ALIGN=MIDDLE  ALT=\"RATE=%282000m%29%2F%2830s%29=%28200m%29%2F%283s%29=200%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m%2Fs ALIGN=MIDDLE  ALT=\"m%2Fs\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Edwin</pre> </SPAN>\n" );
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