Final answer:
The perimeter of a rectangle with a length of 40 feet and a width of 12 feet is calculated using the formula P = 2l + 2w, resulting in a perimeter of 104 feet.
Step-by-step explanation:
The perimeter of a rectangle is calculated by adding together two times the length and two times the width. The formula for the perimeter (P) of a rectangle is P = 2l + 2w, where l is the length and w is the width of the rectangle.
For a rectangle with a length of 40 feet and a width of 12 feet:
- Double the length: 2 × 40 feet = 80 feet
- Double the width: 2 × 12 feet = 24 feet
- Add them together: 80 feet + 24 feet = 104 feet
Therefore, the perimeter of this rectangle is 104 feet.