Question
Jean was travelling from Point P to Point Q at a constant speed of 60 km/h. After 4 hours, she passed a van coming from the opposite direction. Jean travelled another 180 km to reach Point Q. At this point, the van was still 54 km from Point P. What is the average speed of the van?
3 m

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Jean was travelling from Point P to Point Q at a constant speed of 60 km/h. After 4 hours, she passed a van coming from the opposite direction. Jean travelled another 180 km to reach Point Q. At this point, the van was still 54 km from Point P. What is the average speed of the van?