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Multiple choice
a. 12 pie cm
b. 21 pie cm
c. 35 pie cm

Multiple choice a. 12 pie cm b. 21 pie cm c. 35 pie cm-example-1
User Kaldrr
by
7.4k points

1 Answer

7 votes

Answer:

The correct option is;

a. 12 pie cm

Explanation:

Cavalieri's principle states that if the cross-sectional area of two or more figures of the same altitude are the same at each level of the figures, then the volumes of the figures are also the same;

Given that the base area of the square based prism and the cylinder are the same, and that the square based prism and the cylinder have equal height of 4 cm, then by Cavalieri's principle, their volumes are the same

The volume of the square based prism = 452 cm³

Therefore, the volume of the cylinder (of equal base area) = 452 cm³

The formula for the volume of square based prism = Area of base × Height

∴ The volume of square based prism, 452 cm³ = Area of base × 4 cm

Which gives;

Area of the base of the square based prism = 452/4 = 113 cm²

The area of the base of the cylinder
A_c = The area of the base of the square based prism = 113 cm²

The area of the base of the cylinder,
A_c is given by the following equation;


A_c = π×r² = 113 cm²

r = √(113/π) = √35.97 ≈ √36 = 6 cm

The circumference of the base of the cylinder,
C_c is given by the following equation


C_c = 2×π×r ≈ 2×π×6 = 12×π cm

The correct option is 12 pie cm.

User Hndr
by
7.7k points