document.write( "Question 1061528: A passenger train travels at a speed of 72km/h. A man on the passenger train observes a goods train travelling at a speed of 54km/h in the opposite direction . If the goods train passes him in 8 seconds, find the length of the goods train.\r
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Algebra.Com's Answer #676304 by ikleyn(52788) $\"\"$ $\"About$

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\n" ); document.write( "A passenger train travels at a speed of 72km/h. A man on the passenger train observes a goods train travelling at a speed
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document.write( "The speed of the passenger train is 72 km/h = 20 m/s.\r\n" );
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document.write( "The speed of the goods train is 54 km/h = 15 m/s.\r\n" );
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document.write( "The passenger is moving with the speed 20 m/s + 15 m/s = 35 m/s relative to the goods train (since the trains moves in opposite directions).\r\n" );
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document.write( "Hence, the passenger sees the goods train before his own eyes during  seconds, where L is the length of the goods train. \r\n" );
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document.write( "So, your equation is \r\n" );
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document.write( " = 8,\r\n" );
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document.write( "which gives the length of the goods train L = 8*35 = 280 m.\r\n" );
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document.write( "Answer.  The length of the goods train is 280 m.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved. \r
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\n" ); document.write( "\n" ); document.write( "For many other similar and closely related Travel and Distance problems see the lessons\r
\n" ); document.write( "\n" ); document.write( "    - A train passing a telegraph post and passing a bridge \r
\n" ); document.write( "\n" ); document.write( "    - A train passing a platform \r
\n" ); document.write( "\n" ); document.write( "    - A train passing through a tunnel \r
\n" ); document.write( "\n" ); document.write( "    - A light-rail train passing a walking person \r
\n" ); document.write( "\n" ); document.write( "    - A train passing another train \r
\n" ); document.write( "\n" ); document.write( "in this site.\r
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\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook in ALGEBRA-I in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this textbook under the section \"Word problems\", the topic \"Travel and Distance problems\".\r
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\n" ); document.write( "\n" ); document.write( "I understand that you are in rush, but I insistently recommend you to read these lessons.
\n" ); document.write( "It may happen this reading will be the best in your life.\r
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