Question
Isaac started travelling at 11 a.m. at a speed of 63 km/h towards a town. Scarlett started travelling towards the town from the same place 3 hours later. When Isaac reached the town at 5 p.m., Scarlett had another 180 km to travel. What was Scarlett's average speed?
3 m

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Isaac started travelling at 11 a.m. at a speed of 63 km/h towards a town. Scarlett started travelling towards the town from the same place 3 hours later. When Isaac reached the town at 5 p.m., Scarlett had another 180 km to travel. What was Scarlett's average speed?