document.write( "Question 363841: Train A leaves a station traveling at 60 miles per hour. Six hours later train B leaves the same station traveling in the same direction at 80 miles per hour. How long does it take for train B to catch up to train A. Please Help Me!! \n" ); document.write( "

Algebra.Com's Answer #259481 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi, 
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document.write( "Let x represent the amount of time Train B traveled.  
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document.write( "Then (x+7hr) represents the amount of  time train A traveled
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document.write( "distance = rate*time.  distance the same for both Train and Train B
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document.write( "60mph*(x+7hr) = 80mph*x
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document.write( "solving for x
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document.write( "60mph*x+ 60mph*7 = 80mph*x
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document.write( "60mph*7hr = 80mph*x -60mph*x+  
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document.write( "420mi = 20mph*x
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document.write( "21hrs = x
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document.write( "Takes Train B 21hrs to catch up with Train A
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document.write( "checking our answer
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document.write( "60mph*28hr = 80mph*21hr = 1680mi \n" );
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