Question
Isaiah started travelling at 9 a.m. at a speed of 67 km/h towards a town. Luke started travelling towards the town from the same place 4 hours later. When Isaiah reached the town at 5 p.m., Luke had another 180 km to travel. What was Luke's average speed?
3 m

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Isaiah started travelling at 9 a.m. at a speed of 67 km/h towards a town. Luke started travelling towards the town from the same place 4 hours later. When Isaiah reached the town at 5 p.m., Luke had another 180 km to travel. What was Luke's average speed?