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a train travels 600 miles from Los Angles to San Francisco traveling at a certain speed the return trip is made traveling 40 mph faster the return time is 4 less how fast was the train traveling in each direction?
10 years ago

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Steve
since time = distance/speed, then if the first speed was x mph,

600/x = 600/(x+40) + 4
x = 60

Check:
outbound: 60 mph: 10 hrs
return: 100 mph: 6 hrs
10 years ago

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