Question
Gabby was travelling from Point Y to Point Z at a constant speed of 85 km/h. After 4 hours, she passed a bus coming from the opposite direction. Gabby travelled another 425 km to reach Point Z. At this point, the bus was still 35 km from Point Y. What is the average speed of the bus?
3 m

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Gabby was travelling from Point Y to Point Z at a constant speed of 85 km/h. After 4 hours, she passed a bus coming from the opposite direction. Gabby travelled another 425 km to reach Point Z. At this point, the bus was still 35 km from Point Y. What is the average speed of the bus?