SOLUTION: a freight train travel 180 miles in the same time a passenger train travels 200 miles. if the passenger train is 15 miles per hour faster, what is the speed of the freight train?

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Question 1072049: a freight train travel 180 miles in the same time a passenger train travels 200 miles. if the passenger train is 15 miles per hour faster, what is the speed of the freight train?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
Let n be the speed of the freight train. Then the passenger train would be n+15. So:
180/n=200/(n+15)
180n+2700=200n
20n=2700
n=135 mph as the speed of the freight train; 150 mph as the speed of the passenger train. ☺☺☺☺