Question
Isaiah started travelling at 8 a.m. at a speed of 81 km/h towards a town. Liam started travelling towards the town from the same place 3 hours later. When Isaiah reached the town at 8 p.m., Liam had another 180 km to travel. What was Liam's average speed?
3 m

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Isaiah started travelling at 8 a.m. at a speed of 81 km/h towards a town. Liam started travelling towards the town from the same place 3 hours later. When Isaiah reached the town at 8 p.m., Liam had another 180 km to travel. What was Liam's average speed?