Multiple choice

Ryan takes 15 minutes to walk to school at an average speed of 70 m/min. His brother takes 20 minutes to walk the same distance. Determine his brother's average speed.

  1. 52.5 m/min

  2. 60.3 m/min

  3. 68.7 m/min

  4. 77.1 m/min
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A Correct answer
Explanation

Distance = speed * time = 70 m/min * 15 min = 1050 meters. Brother's speed = 1050 meters / 20 min = 52.5 m/min.

AI explanation

The total distance to the school is found by multiplying Ryan's speed by his time, giving 70 m/min multiplied by 15 min, which equals 1050 m. His brother takes 20 minutes to walk this same distance. Using the formula Speed equals Distance divided by Time, the brother's speed is 1050 m divided by 20 min, resulting in an average speed of 52.5 m/min.

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