Question
Emily was travelling from Point P to Point Q at a constant speed of 85 km/h. After 2 hours, she passed a bus coming from the opposite direction. Emily travelled another 85 km to reach Point Q. At this point, the bus was still 37 km from Point P. What is the average speed of the bus?
3 m

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Emily was travelling from Point P to Point Q at a constant speed of 85 km/h. After 2 hours, she passed a bus coming from the opposite direction. Emily travelled another 85 km to reach Point Q. At this point, the bus was still 37 km from Point P. What is the average speed of the bus?