SOLUTION: an express train leaves grand central station 1 hour after a freight train leaves the same station. the express train is traveling 15 mph faster that the freight treain.find the ra

Question 343237: an express train leaves grand central station 1 hour after a freight train leaves the same station. the express train is traveling 15 mph faster that the freight treain.find the rate at which each train is traveling if the express train overtakes the freight train in 3 hours.
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
freight train speed be x mph
express train speed = x+15 mph
..
the express train leaves the station 1 hour later.
..
express train travels 3(x+15)miles
freight train travels 4x miles
4x=3(x+15)
4x=3x+45
4x-3x=45
x=45 mph the speed of freight train.
speed of express train = x+15 = 60 mph
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