Question
Harris started travelling at 6 a.m. at a speed of 66 km/h towards a town. Christian started travelling towards the town from the same place 4 hours later. When Harris reached the town at 4 p.m., Christian had another 180 km to travel. What was Christian's average speed?
3 m

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Harris started travelling at 6 a.m. at a speed of 66 km/h towards a town. Christian started travelling towards the town from the same place 4 hours later. When Harris reached the town at 4 p.m., Christian had another 180 km to travel. What was Christian's average speed?