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A train passes city X at 9.55 am and Y city at 10.15 am . The distance between cities X and Y is 45 miles . What is the average speed, in miles per hour of the train ?
A train passes city X at 9.55 am and Y city at 10.15 am . The distance between cities X and Y is 45 miles . What is the average speed, in miles per hour of the train ?