Need help with the question

Question

A square shaped park has an area of 400ft^2. What was the length of one side of the park? Write and solve an equation to justify your answer and be sure to write your answer in proper form

Answer 1

The area of a square is the length of a side squared, hence its name and the unit ft^2

Therefore, s^2 = 400 ft^2

Taking the square root of both sides, s = 20 ft