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A motorists driving at 60km/h was expected to arrive on time in town A, 200km away. After driving for one hour, the car got a puncture and took 20 minutes to change the wheel. At what speed in km/h did he drive after repairing the puncture if he had to arrive at the expected time.
A. 105
B. 100
C. 70
D. #52frac{1}{2}#