SOLUTION: An express and local train leave Grays Lake at 3 P.M. and head for Chicago 50 miles away. The express travels twice as fast as the local and arrives 1 hour ahead of the local. Find

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Question 143062: An express and local train leave Grays Lake at 3 P.M. and head for Chicago 50 miles away. The express travels twice as fast as the local and arrives 1 hour ahead of the local. Find the speed of each train.
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
Distance is 50. Distance = speed * time.
Let s = the speed of the local. Then 2s is the express.
Let the time for the express be t (in hours)
Given : %282s%2At%29+=+%28s%2A%28t%2B1%29%29
2t+=+t%2B1
t+=+1
50 = s*t = s*1 = s
Speed of express is 50
Speed of local is 25