Question
Risa started travelling at 6 a.m. at a speed of 81 km/h towards a town. Elijah started travelling towards the town from the same place 3 hours later. When Risa reached the town at 4 p.m., Elijah had another 180 km to travel. What was Elijah's average speed?
3 m

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Risa started travelling at 6 a.m. at a speed of 81 km/h towards a town. Elijah started travelling towards the town from the same place 3 hours later. When Risa reached the town at 4 p.m., Elijah had another 180 km to travel. What was Elijah's average speed?