Question
Liam started travelling at 11 a.m. at a speed of 66 km/h towards a town. David started travelling towards the town from the same place 5 hours later. When Liam reached the town at 9 p.m., David had another 180 km to travel. What was David's average speed?
3 m

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Liam started travelling at 11 a.m. at a speed of 66 km/h towards a town. David started travelling towards the town from the same place 5 hours later. When Liam reached the town at 9 p.m., David had another 180 km to travel. What was David's average speed?