Question
Diana was travelling from Point B to Point C at a constant speed of 70 km/h. After 3 hours, she passed a bus coming from the opposite direction. Diana travelled another 210 km to reach Point C. At this point, the bus was still 45 km from Point B. What is the average speed of the bus?
3 m

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Diana was travelling from Point B to Point C at a constant speed of 70 km/h. After 3 hours, she passed a bus coming from the opposite direction. Diana travelled another 210 km to reach Point C. At this point, the bus was still 45 km from Point B. What is the average speed of the bus?