SOLUTION: The speed of one train is 15 km/h greater than that of another train . Both trains leave at the same time from stations 428 km apart . If they pass 4 h later , what is the speed o

Question 1173678: The speed of one train is 15 km/h greater than that of another train . Both trains leave at the
same time from stations 428 km apart . If they pass 4 h later , what is the speed of each train ? (Assume trains are going towards each other)

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
combined speed is x + x+15=2x+15 km/h
428 km needs to be closed, and in 4 hours, they cover 8x+60 km
that sum, or 8x+60=428
8x=368
x=46 km/h for slower train
x+15=61 km/h for faster train

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