The table shows the distance that two trains are from Center Station at various times of the day. Miles From Center StationTime of dayTrain 1Train 211:3013712:00312712:455857How do the speeds of the trains compare?

From 11:30 to 12:00, Train 1 travels 31 − 13 = 18 miles in half an hour, so its speed is 36 miles per hour. Train 2 travels 27 − 7 = 20 miles in half an hour, so its speed is 40 miles per hour. Train 2 is traveling 40 − 36 = 4 miles per hour faster than Train 1, which is choice C.

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