Answer:
If the diagonal of a square is 11.3 meters, then basing on Pythagorean theorem, the side of square could be calculated:
S = sqrt(diagonal^2/2) = sqrt(11.3^2/2) = 8 (m)
=> Approximately, the perimeter of square is calculated by:
P = side x 4 = 8 x 4 = 32 (m)
Hope this helps!
:)