Question
Noah started travelling at 8 a.m. at a speed of 61 km/h towards a town. Hannah started travelling towards the town from the same place 4 hours later. When Noah reached the town at 8 p.m., Hannah had another 180 km to travel. What was Hannah's average speed?
3 m

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Noah started travelling at 8 a.m. at a speed of 61 km/h towards a town. Hannah started travelling towards the town from the same place 4 hours later. When Noah reached the town at 8 p.m., Hannah had another 180 km to travel. What was Hannah's average speed?