Question
Liam started travelling at 6 a.m. at a speed of 67 km/h towards a town. Benjamin started travelling towards the town from the same place 3 hours later. When Liam reached the town at 4 p.m., Benjamin had another 180 km to travel. What was Benjamin's average speed?
3 m

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Liam started travelling at 6 a.m. at a speed of 67 km/h towards a town. Benjamin started travelling towards the town from the same place 3 hours later. When Liam reached the town at 4 p.m., Benjamin had another 180 km to travel. What was Benjamin's average speed?