• 2023 April(F11) Math Question 35

    Perimeter, Area, Volume

    - Mixed Shapes

    Choice C

    Square area =122=144= 12^2 = 144 sq ft.

    Semicircle area =12π(6)2=18π= \frac{1}{2}\pi(6)^2 = 18\pi sq ft.

    Shaded area =144−18π≈144−56.5=87.5= 144 - 18\pi \approx 144 - 56.5 = 87.5 sq ft.

    Cost≈87.5×6.25≈$547\text{Cost} \approx 87.5 \times 6.25 \approx \$547

    Closest to $550.

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