Step 1 Set up the formula for area of a rectangle. Area is measured in square units such as square inches square feet or square meters. A L W where A is the area L is the length W is the width and means multiply.
To find the area of a rectangle multiply the length by the width.
Thus Area of the rectangle A 500 m x 300 m 1 50000 square meters. In the formula for area A l is the length and w is the width of the rectangle. Now let us calculate the cost of painting the land. Thus Area of the rectangle A 500 m x 300 m 1 50000 square meters.