document.write( "Question 401206: A dog was walking along a train track one day, and traveled along that track onto a train bridge. when the dog was 1/4 of the way across the bridge, he heard a train whistle from an oncoming train that was coming in the same direction the dog has already come. the dog bounded away from the train and made it to the end of the bridge at exactly the same time as the train. what the dog didnt know, but what was also true, was that the dog could have bounded toward the train and made it to the \"start\" of the bridge at exactly the same time as the train. the train was traveling at a speed of 30 miles/hour. how fast was the dog traveling \n" ); document.write( "
Algebra.Com's Answer #283914 by ankor@dixie-net.com(22740)\"\" \"About 
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A dog was walking along a train track one day, and traveled along that track onto a train bridge. when the dog was 1/4 of the way across the bridge, he heard a train whistle from an oncoming train that was coming in the same direction the dog has already come. the dog bounded away from the train and made it to the end of the bridge at exactly the same time as the train. what the dog didnt know, but what was also true, was that the dog could have bounded toward the train and made it to the \"start\" of the bridge at exactly the same time as the train. the train was traveling at a speed of 30 miles/hour. how fast was the dog traveling.
\n" ); document.write( ":
\n" ); document.write( "This is thought problem that you can do in your head.
\n" ); document.write( ":
\n" ); document.write( "The dog has run 1/4 mile when the train enters the bridge
\n" ); document.write( "If the dog goes the same direction as the train is traveling, he will be
\n" ); document.write( "at the half way point on the bridge, when the train enters the bridge.
\n" ); document.write( "Therefore
\n" ); document.write( "The train travels the whole length of the bridge while the dog travels half the
\n" ); document.write( "length of the bridge.
\n" ); document.write( "therefore
\n" ); document.write( "The dog runs at half the speed of the train, or 15 mph \n" ); document.write( "
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