document.write( "Question 11429: A passenger train and a freight train start at the same point at the same time and travel in opposite directions. The passenger train travels twice as fast as the freight train. In 4 hours they are 396 miles apart. What is the rate of each train \n" ); document.write( "
Algebra.Com's Answer #5929 by askmemath(368)\"\" \"About 
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Let the speed of the 1st train = X
\n" ); document.write( "Then speed of second = 2X
\n" ); document.write( "Each travels for 4 hours
\n" ); document.write( "So distance covered by each = 4X+8X = 12X
\n" ); document.write( "But this is given as 396
\n" ); document.write( "So 12X = 396
\n" ); document.write( "X = 396/12 = 35.5mph
\n" ); document.write( "Speed of the second train = 2 x 35.5 = 71mph
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