radius of the circle: 15 m
side of the square: 2*15 = 30 m
Area of the square = side² = 30² = 900 m²
Area of the circle = π*r² = π*15² = 706.9 m²
Area of shaded region = Area of the square - Area of the circle = 900 - 706.9 = 193.1 m²
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