Calculate the perimeter of a square with a side length of 5 m.

To find the perimeter of a square, you can use the formula:

Perimeter = 4 × side length.

In this case, the side length of the square is 5 meters. Plugging the value into the formula gives:

Perimeter = 4 × 5 m = 20 m.

Thus, the perimeter of the square is 20 meters, which confirms that the correct answer is indeed the one that reflects this calculation. The perimeter represents the total distance around the square, and since each side has an equal length, multiplying the length of one side by four correctly provides the total perimeter.