document.write( "Question 1015965: A \"Local\" train leaves a station and runs at an average rate of 35 mph. An hour and a half later an \"Express\" train leaves the station and travels at an average rate of 56 mph on a parallel track. How many hours after the Express train starts will the it overtake the Local? (in hours) \n" ); document.write( "
Algebra.Com's Answer #632492 by macston(5194)\"\" \"About 
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Local: (35mph)(1.5hr)=52.5 mi
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\n" ); document.write( "When the express train starts, the local is 52.5 miles ahead.
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\n" ); document.write( "The express catches up (56mph-35mph=) 21 miles per hour.
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\n" ); document.write( "52.5 miles/ 21 mi/hr=2.5 hours
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\n" ); document.write( "ANSWER: The express train will catch the local 2.5 hours after
\n" ); document.write( "the express train starts.
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