Question
A car travels at 60 km/h for 1 hour, 45 km/h for 2
hours, and 90 km/h for 1 hour. Find its average speed.Solution
Total distance = 60×1 + 45×2 + 90×1 = 240 km Total time = 1 + 2 + 1 = 4 hours Average speed = 240/4 = 60 km/h
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