Question
Charlotte started travelling at 10 a.m. at a speed of 64 km/h towards a town. Samantha started travelling towards the town from the same place 4 hours later. When Charlotte reached the town at 6 p.m., Samantha had another 180 km to travel. What was Samantha's average speed?
3 m

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Charlotte started travelling at 10 a.m. at a speed of 64 km/h towards a town. Samantha started travelling towards the town from the same place 4 hours later. When Charlotte reached the town at 6 p.m., Samantha had another 180 km to travel. What was Samantha's average speed?