The railway line from Tianjin to Jinan is 360 kilometers long. How many kilometers per hour does the train run on average? (the train from Tianjin to Jinan leaves at 12:30 and arrives at 6:00)

Time = 6:00 + 12-12:30 = 5:30 = 5.5 hours
The average train speed is 360 △ 5.5 = 65 and 9 / 20 km per hour

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