To figure out the width and perimeter of the land, you look at the information you already have. We have the area, which is 48 square miles. The length is 6 miles. Area is length times width. To find the width with the information, we need to divide the area by the length. 48 square miles divided by 6 miles is 8 miles. The width is 8 miles. To find the perimeter, we have to add all sides. There are two length sides and two width sides, so we would add 6 miles, 6 miles, 8 miles, and 8 miles. The perimeter would then be 28 miles.