To determine the time it will take to cover a distance of 800 miles at an average speed of 20 miles per hour, we can use the formula:
Time = Distance / Speed
Plugging in the values:
Time = 800 miles / 20 miles per hour
Time = 40 hours
Therefore, it will take approximately 40 hours to cover a distance of 800 miles at an average speed of 20 miles per hour.