Question
Christopher started travelling at 7 a.m. at a speed of 76 km/h towards a town. Andrew started travelling towards the town from the same place 2 hours later. When Christopher reached the town at 4 p.m., Andrew had another 180 km to travel. What was Andrew's average speed?
3 m

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Christopher started travelling at 7 a.m. at a speed of 76 km/h towards a town. Andrew started travelling towards the town from the same place 2 hours later. When Christopher reached the town at 4 p.m., Andrew had another 180 km to travel. What was Andrew's average speed?