Question
Barbara was travelling from Point U to Point V at a constant speed of 85 km/h. After 4 hours, she passed a van coming from the opposite direction. Barbara travelled another 340 km to reach Point V. At this point, the van was still 40 km from Point U. What is the average speed of the van?
3 m

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Barbara was travelling from Point U to Point V at a constant speed of 85 km/h. After 4 hours, she passed a van coming from the opposite direction. Barbara travelled another 340 km to reach Point V. At this point, the van was still 40 km from Point U. What is the average speed of the van?