the radius of the base of a cone is 5 cm and its perpendicular height is 12 cm find its curved surface area and volume of a cone
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The curved surface area of a cone is , where is the radius and is slant height We need to calculate slant height, it can be done by using the formula l² = r² + h² , where is height.
So, = l = √(r² + h²)
= √(5² + 12²)
= √(25 + 144)
= 169
We have curved surface area of a cone is
pie × r × l = pie × 5 × 13 = 65 pie cm²
Hence, the answer is 65 pie cm²
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