Question
Bryan started travelling at 10 a.m. at a speed of 61 km/h towards a town. Caleb started travelling towards the town from the same place 3 hours later. When Bryan reached the town at 4 p.m., Caleb had another 180 km to travel. What was Caleb's average speed?
3 m

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Bryan started travelling at 10 a.m. at a speed of 61 km/h towards a town. Caleb started travelling towards the town from the same place 3 hours later. When Bryan reached the town at 4 p.m., Caleb had another 180 km to travel. What was Caleb's average speed?