б) 1,1 м

The figure is composed of 5 squares. The side length of each square is 1.1 m / 3 = 0.366... m. The area of one square is (1.1/3) * (1.1/3) = 1.21 / 9 sq m. The total area is 5 * (1.21 / 9) sq m = 6.05 / 9 sq m ≈ 0.672 sq m.