document.write( "Question 221465: It takes a train 7 seconds to pass by a stationary observer and 26 seconds to travel the length of a station 380 meters long. What is the speed of the train and its length?
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Algebra.Com's Answer #166169 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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It takes a train 7 seconds to pass by a stationary observer and 26 seconds to travel the length of a station 380 meters long.
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\n" ); document.write( "let s = speed of the train in meters/sec
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\n" ); document.write( "7s = length of the train
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\n" ); document.write( "time of the front of the train passing the platform
\n" ); document.write( "It passes the platform 26-7 = 19 sec
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\n" ); document.write( "s = $\"380%2F19\"$
\n" ); document.write( "s = 20 meters/sec
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\n" ); document.write( "Train length = 7s
\n" ); document.write( "7(20) = 140 meters long
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\n" ); document.write( "The speed of train in km/hr = $\"%283600%2A20%29%2F1000\"$ = 72 km/hr \n" ); document.write( "

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