SOLUTION: 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
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Question 192903: 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 many hours after it starts will the Express overtake the Local? Answer by checkley77(12844) (Show Source):
You can put this solution on YOUR website! 35x=56(x-1.5)
35x=56x-84
35x-56x=-84
-21x=-84
x=-84/-21
x=4 hours.
4-1.5=2.5 hours after the express train left it will overtake the local train.
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