Question 798461
Two trains leave the station at the same time, one heading west and the other east. The westbound train 60 travels at miles per hour. The eastbound train 80 travels at miles per hour. How long will it take for the two trains to be  168 miles apart?
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The speeds are added when going in opposite directions.
The separate at 140 mi/hr (60+80)
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d = r*t
t = d/r = 168/140
t = 1.2 hours