
James C. answered 09/08/21
Experienced (30+ years) high school physics teacher, conceptual to AP
To obtain a speed in meters per second, you will first need to convert 14.1 minutes to seconds.
Multiplying (14.1 minutes) * (60 seconds / minute), we get t = 846 seconds.
Average speed is equal to distance traveled divided by time taken. If the person completed one lap, then the distance traveled equals 400 m. To find speed, divide 400 m by 846 s.