Question
Lilian started travelling at 9 a.m. at a speed of 72 km/h towards a town. Chloe started travelling towards the town from the same place 2 hours later. When Lilian reached the town at 3 p.m., Chloe had another 180 km to travel. What was Chloe's average speed?
3 m

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Lilian started travelling at 9 a.m. at a speed of 72 km/h towards a town. Chloe started travelling towards the town from the same place 2 hours later. When Lilian reached the town at 3 p.m., Chloe had another 180 km to travel. What was Chloe's average speed?