Question
Shannon was travelling from Point Y to Point Z at a constant speed of 90 km/h. After 3 hours, she passed a car coming from the opposite direction. Shannon travelled another 180 km to reach Point Z. At this point, the car was still 50 km from Point Y. What is the average speed of the car?
3 m

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Shannon was travelling from Point Y to Point Z at a constant speed of 90 km/h. After 3 hours, she passed a car coming from the opposite direction. Shannon travelled another 180 km to reach Point Z. At this point, the car was still 50 km from Point Y. What is the average speed of the car?