What is the area and perimeter of a rectangle that is 8km long and 5km wide?

The area of a rectangle is calculated by multiplying its length by its width. In this case, the area would be 8km x 5km = 40 square kilometers. The perimeter of a rectangle is found by adding the lengths of all four sides. For this rectangle, the perimeter would be 2(8km) + 2(5km) = 16km + 10km = 26 kilometers.