Question
Yoko was travelling from Point U to Point V at a constant speed of 90 km/h. After 4 hours, she passed a convertible coming from the opposite direction. Yoko travelled another 270 km to reach Point V. At this point, the convertible was still 57 km from Point U. What is the average speed of the convertible?
3 m

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Yoko was travelling from Point U to Point V at a constant speed of 90 km/h. After 4 hours, she passed a convertible coming from the opposite direction. Yoko travelled another 270 km to reach Point V. At this point, the convertible was still 57 km from Point U. What is the average speed of the convertible?