Question
Riordan started travelling at 5 a.m. at a speed of 66 km/h towards a town. Andrew started travelling towards the town from the same place 5 hours later. When Riordan 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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Riordan started travelling at 5 a.m. at a speed of 66 km/h towards a town. Andrew started travelling towards the town from the same place 5 hours later. When Riordan reached the town at 4 p.m., Andrew had another 180 km to travel. What was Andrew's average speed?