Question
Vanessa was travelling from Point M to Point N at a constant speed of 100 km/h. After 5 hours, she passed a lorry coming from the opposite direction. Vanessa travelled another 400 km to reach Point N. At this point, the lorry was still 36 km from Point M. What is the average speed of the lorry?
3 m

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Vanessa was travelling from Point M to Point N at a constant speed of 100 km/h. After 5 hours, she passed a lorry coming from the opposite direction. Vanessa travelled another 400 km to reach Point N. At this point, the lorry was still 36 km from Point M. What is the average speed of the lorry?