Solve the problem.An express and local train leave Grayslake 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.
A. Express's rate = 60 mph and local's rate = 30 mph.
B. Express's rate = 25 mph and local's rate = 12.5 mph.
C. Express's rate = 50 mph and local's rate = 25 mph.
D. Cannot be determined with information given.
Answer: C
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