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anonymous

  • 5 years ago

Prove the surface area of a cone with base radius R and a slant height of L is given by PiRL

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  1. anonymous
    • 5 years ago
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    Integral calculus: the solid formed by revolving height l and width pi r

  2. anonymous
    • 5 years ago
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    No that would give volume. May be double or triple integrals.

  3. anonymous
    • 5 years ago
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    Non-calculus method: cut the cone open and spread the surface into a rectangle, multiply height l by width pi r = surface area.

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