Question
Fiona was travelling from Point M to Point N at a constant speed of 85 km/h. After 5 hours, she passed a bus coming from the opposite direction. Fiona travelled another 255 km to reach Point N. At this point, the bus was still 50 km from Point M. What is the average speed of the bus?
3 m

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Fiona was travelling from Point M to Point N at a constant speed of 85 km/h. After 5 hours, she passed a bus coming from the opposite direction. Fiona travelled another 255 km to reach Point N. At this point, the bus was still 50 km from Point M. What is the average speed of the bus?