Question
A frustum of a cone has radii of 5 cm and 3 cm, and a
height of 8 cm. What is its volume?Solution
Volume of a frustum of a cone = (1/3)πh(R² + Rr + r²) = (1/3)π * 8 * (5² + 5*3 + 3²) = 410.66                    ≈ 411 cm³. Answer: (B)
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