document.write( "Question 379060: Two trains leave stations 476 miles apart at the same time and travel toward each other. One train travels at 80 miles per hour while the other travels at 90 miles per hour. How long will it take for the two trains to meet? \n" ); document.write( "

Algebra.Com's Answer #269206 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "D = r*t OR d/r = t  Question sets up an equality as to time each traveled.
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document.write( "stations 476 miles apart 
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document.write( "Let x and (476 - x) represent the respective distances the trains traveled 
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document.write( "cross multiply to solve for x
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document.write( "80*x = 90(476-x)
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document.write( "80x = 90*476 - 90x
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document.write( "170x = 90*476
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document.write( "x = 90*476/170 
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document.write( "x = 252, distance traveled by train going 90mph
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document.write( "252mi/90mpn = 2.8 hr, time it takes for the two trains to meet
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document.write( "CHECKING our Answer
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document.write( "90*2.8hr + 80*2.8hr = 252mi + 224mi = 476mi \n" );
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