Final answer:
The person's average speed for the 400 meter dash completed in 58 seconds is approximately 6.9 meters per second.
Step-by-step explanation:
To calculate the average speed of a person running a 400 meter dash in 58 seconds, we use the formula:
Speed = Distance / Time
Here, the Distance covered is 400 meters and the Time taken is 58 seconds. Thus, the average speed can be calculated as follows:
Speed = 400 meters / 58 seconds
Speed = 6.8965 meters per second (rounded to four decimal places)
The person's average speed during the run is approximately 6.9 m/s.