Question
Emily started travelling at 11 a.m. at a speed of 81 km/h towards a town. Stella started travelling towards the town from the same place 2 hours later. When Emily reached the town at 3 p.m., Stella had another 180 km to travel. What was Stella's average speed?
3 m

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Emily started travelling at 11 a.m. at a speed of 81 km/h towards a town. Stella started travelling towards the town from the same place 2 hours later. When Emily reached the town at 3 p.m., Stella had another 180 km to travel. What was Stella's average speed?