Question
A train travels at a speed of 60 km/h for the first 1
hour, 50 km/h for the next 2 hours, and 40 km/h for the next 3 hours. What is the average speed of the train?Solution
Total distance = (60 × 1) + (50 × 2) + (40 × 3) = 60 + 100 + 120 = 280 km. Total time = 1 + 2 + 3 = 6 hours. Average speed = Total distance / Total time = 280 / 6 = 46.67 km/h.
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