document.write( "Question 765987: : passenger train having speed 29 km/h and a express train having speed 65 km/h. the express train crosses the passenger train in 16 seconds. what is the length of express train? give answer \n" ); document.write( "
Algebra.Com's Answer #466568 by josmiceli(19441)\"\" \"About 
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I'm not sure what \"crosses\" means. Is that the
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\n" ); document.write( "There are 3 possible cases:
\n" ); document.write( "(1) they are going in the same direction
\n" ); document.write( "(2) They are going in opposite directions
\n" ); document.write( "(3) They \"cross\" at some angle\r
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