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A Local train leaves a station and runs at an average rate of 35 mph An hour and a half later an Express train leaves the station and travels at an average rate of 56 mph on a parallel track How?
Wiki User
∙ 14y ago
When the express leaves the station, the local's lead is (1.5 x 35) miles.
The lead closes at the rate of (56-35) = 21 mph.
The express overtakes the local after (1.5 x 35 / 21) = 2.5 hours.
The dramatic event takes place at a spot 140 miles out from the station.
Wiki User
∙ 14y ago
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