Question
Eva was travelling from Point Y to Point Z at a constant speed of 90 km/h. After 3 hours, she passed a bus coming from the opposite direction. Eva travelled another 270 km to reach Point Z. At this point, the bus was still 45 km from Point Y. What is the average speed of the bus?
3 m

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Eva was travelling from Point Y to Point Z at a constant speed of 90 km/h. After 3 hours, she passed a bus coming from the opposite direction. Eva travelled another 270 km to reach Point Z. At this point, the bus was still 45 km from Point Y. What is the average speed of the bus?