Final answer:
To calculate how long Benny takes to cover 1280 meters, we find his walking speed from the provided 800 meters in 5 minutes and apply it to the new distance. Benny's walking speed is 160 meters per minute, so it will take him 8 minutes to walk 1280 meters.
Step-by-step explanation:
Benny can cover 800 meters in 5 minutes, so to find out how long it takes him to cover 1280 meters, we first determine his walking speed. We calculate the speed by dividing the distance traveled by the time it takes, which gives us 800 meters divided by 5 minutes, or 160 meters per minute.
To find the time it takes to walk 1280 meters at this speed, we divide the new distance by the speed: 1280 meters divided by 160 meters per minute equates to 8 minutes. Benny would therefore require 8 minutes to cover a distance of 1280 meters on foot.