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Mathematics for IGCSE & O level - Mensuration (Section 12 - No. 46)

If you only know the curved surface area of a cone and the radius of its base, which formula can you use to find the slant height?
Slant height = curved surface area / πr
Slant height = curved surface area / πr²
Slant height = curved surface area * πr
Slant height = curved surface area - πr

स्पष्टीकरण

Curved surface area of a cone is πrl, therefore slant height (l) = curved surface area / πr.

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