Question
Abi was travelling from Point Q to Point R at a constant speed of 75 km/h. After 3 hours, she passed a bus coming from the opposite direction. Abi travelled another 225 km to reach Point R. At this point, the bus was still 30 km from Point Q. What is the average speed of the bus?
3 m

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Abi was travelling from Point Q to Point R at a constant speed of 75 km/h. After 3 hours, she passed a bus coming from the opposite direction. Abi travelled another 225 km to reach Point R. At this point, the bus was still 30 km from Point Q. What is the average speed of the bus?