Question
Lily started travelling at 8 a.m. at a speed of 81 km/h towards a town. Aaron started travelling towards the town from the same place 4 hours later. When Lily reached the town at 8 p.m., Aaron had another 180 km to travel. What was Aaron's average speed?
3 m

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Lily started travelling at 8 a.m. at a speed of 81 km/h towards a town. Aaron started travelling towards the town from the same place 4 hours later. When Lily reached the town at 8 p.m., Aaron had another 180 km to travel. What was Aaron's average speed?