Final answer:
The area of the square barn is 25 square meters.
Step-by-step explanation:
To find the area of a square, you need to multiply the length of one side by itself. In this case, the sides of the square barn are 5 meters long. So, to find the area, you would calculate 5 meters multiplied by 5 meters. This equals 25 square meters.
Learn more about Calculating area of a square