A train travels 60 km in the first hour and 40 km in the second hour. What is the average speed over the two hours?

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Multiple Choice

A train travels 60 km in the first hour and 40 km in the second hour. What is the average speed over the two hours?

Explanation:
Average speed is total distance divided by total time. The train covers 60 km in the first hour and 40 km in the second hour, so it travels 100 km in 2 hours. Therefore, the average speed is 100 km ÷ 2 h = 50 km/h. Since each hour is the same duration, the simple average of the hourly speeds equals the overall average here, though with different time spans you’d weight speeds by the time spent at each speed.

Average speed is total distance divided by total time. The train covers 60 km in the first hour and 40 km in the second hour, so it travels 100 km in 2 hours. Therefore, the average speed is 100 km ÷ 2 h = 50 km/h. Since each hour is the same duration, the simple average of the hourly speeds equals the overall average here, though with different time spans you’d weight speeds by the time spent at each speed.

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