document.write( "Question 1059946: an express train travel 150 km in the same time that a freight train travel 100 km if the express train goes 2 km per hour faster than the freight train find the rate of each train \n" ); document.write( "

Algebra.Com's Answer #675001 by ikleyn(52775) $\"\"$ $\"About$

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\n" ); document.write( "an express train travel 150 km in the same time that a freight train travel 100 km if the express train goes 2 km per hour faster
\n" ); document.write( "than the freight train find the rate of each train
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document.write( "Let f be the speed of the freight train in km/h.\r\n" );
document.write( "Then the speed of the express train is (f+2) km/h.\r\n" );
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document.write( "The condition says that \r\n" );
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document.write( "The left  side is the time for the express train to cover 150 km.\r\n" );
document.write( "The right side is the time for the fraight train to cover 100 km.\r\n" );
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document.write( "To solve the equation, multiply both sides by f*(f+2). You will get\r\n" );
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document.write( "150f = 100(f+2),\r\n" );
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document.write( "150f = 100f + 200,\r\n" );
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document.write( "150f - 100f = 200,\r\n" );
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document.write( "50f = 200,\r\n" );
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document.write( "f =  = 4 km/h.\r\n" );
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document.write( "The speed of the freight train is 4 km/h.\r\n" );
document.write( "The speed of the express train is 4+2 = 6 km/h.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Notice: 4 km/h is the speed of walking man.\r
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\n" ); document.write( "\n" ); document.write( "Absurd? - It says everything about the author of the problem.\r
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\n" ); document.write( "\n" ); document.write( "And the question is: for whom I worked on this post ???\r
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