Answer:
A = 225 ft²
Explanation:
the area (A) of a square is calculated as
A = s² ( s is the side length )
we require to find s
the perimeter (P) of a square is calculated as
P = 4s
given P = 60 ft , then
60 = 4s ( divide both sides by 4 )
15 = s
Then
A = s² = 15² = 225 ft²