Question
Sarah was travelling from Point Y to Point Z at a constant speed of 100 km/h. After 3 hours, she passed a lorry coming from the opposite direction. Sarah travelled another 200 km to reach Point Z. At this point, the lorry was still 56 km from Point Y. What is the average speed of the lorry?
3 m

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Sarah was travelling from Point Y to Point Z at a constant speed of 100 km/h. After 3 hours, she passed a lorry coming from the opposite direction. Sarah travelled another 200 km to reach Point Z. At this point, the lorry was still 56 km from Point Y. What is the average speed of the lorry?