Question
Rachel was travelling from Point Y to Point Z at a constant speed of 100 km/h. After 2 hours, she passed a bus coming from the opposite direction. Rachel travelled another 300 km to reach Point Z. At this point, the bus was still 50 km from Point Y. What is the average speed of the bus?
3 m

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Rachel was travelling from Point Y to Point Z at a constant speed of 100 km/h. After 2 hours, she passed a bus coming from the opposite direction. Rachel travelled another 300 km to reach Point Z. At this point, the bus was still 50 km from Point Y. What is the average speed of the bus?