Question
Joshua started travelling at 8 a.m. at a speed of 77 km/h towards a town. Olivia started travelling towards the town from the same place 4 hours later. When Joshua reached the town at 8 p.m., Olivia had another 180 km to travel. What was Olivia's average speed?
3 m

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Joshua started travelling at 8 a.m. at a speed of 77 km/h towards a town. Olivia started travelling towards the town from the same place 4 hours later. When Joshua reached the town at 8 p.m., Olivia had another 180 km to travel. What was Olivia's average speed?