Multiple choice

Trevor went on a journey in which he initially traveled at 45 miles per hour, covering a distance of 135 miles, and then covered a distance of 262.5 miles at a speed of 35 miles per hour. What was the average speed to cover the distance?

  1. 36 miles per hour

  2. 37.85 miles per hour

  3. 38 miles per hour

  4. 39.75 miles per hour

  5. 40.15 miles per hour
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Time 1 = 135 / 45 = 3 hours. Time 2 = 262.5 / 35 = 7.5 hours. Total distance = 135 + 262.5 = 397.5 miles. Total time = 3 + 7.5 = 10.5 hours. Average speed = 397.5 / 10.5 = 37.857... mph.

AI explanation

The first part of the journey takes 135 miles divided by 45 miles per hour, which is 3 hours, and the second part takes 262.5 miles divided by 35 miles per hour, which is 7.5 hours. The total distance is 397.5 miles and the total time is 10.5 hours. By dividing the total distance by the total time, 397.5 divided by 10.5, the average speed is 37.85 miles per hour.

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