SOLUTION: A scenic train ride up the mountain averages 80 miles per hour. The return train ride down the mountain averages 85 miles per hour. The total travel time is 6.6 hours. How long doe

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Question 990471: A scenic train ride up the mountain averages 80 miles per hour. The return train ride down the mountain averages 85 miles per hour. The total travel time is 6.6 hours. How long does each ride take?
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
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S=distance one way
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%28S%2F80mph%29%2B%28S%2F85mph%29=6.6hrs
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S%2B%2880S%2F85mph%29=%2880mph%296.6hrs
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85S%2B80S=%2880mph%29%2885mph%296.6hrs
165S=44880
S=272mi
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Ride up time=S/80mph=272mi/80mph=3.4 hours
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Return trip time=S/85mph=272mi/85mph=3.2 hours