Question
Jacob started travelling at 9 a.m. at a speed of 61 km/h towards a town. Elizabeth started travelling towards the town from the same place 3 hours later. When Jacob reached the town at 3 p.m., Elizabeth had another 180 km to travel. What was Elizabeth's average speed?
3 m

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Jacob started travelling at 9 a.m. at a speed of 61 km/h towards a town. Elizabeth started travelling towards the town from the same place 3 hours later. When Jacob reached the town at 3 p.m., Elizabeth had another 180 km to travel. What was Elizabeth's average speed?