The number of dimes times the value of each dime equals the total value of the dimes. The speed of the express train is 12 miles per hour faster than the speed of the local train. The speed of the loc...The number of dimes times the value of each dime equals the total value of the dimes. The speed of the express train is 12 miles per hour faster than the speed of the local train. The speed of the local train is 48 mph and the speed of the express train is 60 mph. The speed is in miles per hour, so we need to express the times in hours, too, in order for the units to be the same. By looking at the diagram, we can see that the sum of the distance running and the distance biking is 255 miles.
