Question
Nora started travelling at 11 a.m. at a speed of 72 km/h towards a town. Tommy started travelling towards the town from the same place 2 hours later. When Nora reached the town at 7 p.m., Tommy had another 180 km to travel. What was Tommy's average speed?
3 m

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Nora started travelling at 11 a.m. at a speed of 72 km/h towards a town. Tommy started travelling towards the town from the same place 2 hours later. When Nora reached the town at 7 p.m., Tommy had another 180 km to travel. What was Tommy's average speed?