Multiple choice

Suppose a truck travels in segments, as shown in the following table: Segment Distance (km) Time (hr) 1 30 1 2 45 2 3 50 1 4 65 1 What is the average speed of the truck?

  1. 38 km/hr

  2. 40 km/hr

  3. 45 km/hr

  4. 50 km/hr
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A Correct answer
Explanation

Average speed = Total distance / Total time. Total distance = 30 + 45 + 50 + 65 = 190 km. Total time = 1 + 2 + 1 + 1 = 5 hours. Average speed = 190 / 5 = 38 km/hr.

AI explanation

Average speed equals total distance divided by total time. The total distance is 30 km plus 45 km plus 50 km plus 65 km, which equals 190 km, and the total time is 1 hour plus 2 hours plus 1 hour plus 1 hour, which equals 5 hours. Dividing 190 km by 5 hours yields an average speed of 38 km/hr.

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