The radius of a right circular cone is 3 cm and its height is 4 cm. The curved surface of the cone will be

Answer 1

The total surface area of a cone is SA = πrl + πr². Since you only need the curved surface, eliminate the πr², which is the base.

Curved Surface Area: CSA = πrl Find the lateral height by using the formula 3² + 4² = l²

9 + 16 = l² 25 = l² l = 5 cm

CSA = π(3)(5)

CSA = 15π ≈ 47.1239 cm²

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