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Mathematics

The radius of the base of a solid cone is r cm and its height is h cm; its curved surface area is :

  1. π × r × h2−r2\sqrt{h^2 - r^2}

  2. π × r × h2+r2\sqrt{h^2 + r^2}

  3. π × r × (h + r)

  4. πr2(h + r)

Mensuration

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Answer

By formula,

Curved surface area = πrl

= πrh2+r2πr\sqrt{h^2 + r^2}.

Hence, Option 2 is the correct option.

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