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Answer:

120 ft.

Step-by-step explanation:

The area of a square is a². The area of this square is 900 ft², so you need to square root it to get the length of one side. √900 is 30, so each side of the square is 30 ft since all sides of a square all equal. To find the perimeter multiply 30×4 to get 120 ft. Hope this helps :)

The perimeter of a square with an area of 900 square feet is 120 ft.

Calculation of the perimeter of the square:

Since the area is 900 square feet

We know that

The area of square = [tex]a^2[/tex]

So, length of one side should be 30

Now the perimeter should be

= 4(30)

= 120 ft.

hence, The perimeter of a square with an area of 900 square feet is 120 ft.

Learn more about perimeter here: https://brainly.com/question/24599491