Question
Gabby was travelling from Point Y to Point Z at a constant speed of 90 km/h. After 4 hours, she passed a convertible coming from the opposite direction. Gabby travelled another 450 km to reach Point Z. At this point, the convertible was still 40 km from Point Y. What is the average speed of the convertible?
3 m

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Gabby was travelling from Point Y to Point Z at a constant speed of 90 km/h. After 4 hours, she passed a convertible coming from the opposite direction. Gabby travelled another 450 km to reach Point Z. At this point, the convertible was still 40 km from Point Y. What is the average speed of the convertible?