Question
Charlotte started travelling at 9 a.m. at a speed of 90 km/h towards a town. Levi started travelling towards the town from the same place 2 hours later. When Charlotte reached the town at 4 p.m., Levi had another 180 km to travel. What was Levi's average speed?
3 m

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Charlotte started travelling at 9 a.m. at a speed of 90 km/h towards a town. Levi started travelling towards the town from the same place 2 hours later. When Charlotte reached the town at 4 p.m., Levi had another 180 km to travel. What was Levi's average speed?