A township is in the shape of a rectangle that is 5 km long and 4 km wide. There are 2000 residents in the township. What is the population density of the township? A. 100residents/km^2 B. 125residents/km^2 C. 222residents/km^2 D. 500residents/km^2

To find the population density of the township, we need to divide the total number of residents by the area of the township.<br /><br />Given information:<br />- The township is in the shape of a rectangle that is 5 km long and 4 km wide.<br />- There are 2000 residents in the township.<br /><br />Step 1: Calculate the area of the township.<br />Area of the rectangle = length × width<br />Area of the township = 5 km × 4 km = 20 km²<br /><br />Step 2: Calculate the population density of the township.<br />Population density = Total number of residents / Area of the township<br />Population density = 2000 residents / 20 km² = 100 residents/km²<br /><br />Therefore, the correct answer is A. $100 residents/km^{2}$.