If the radius and height of a right circular cone are $5\text{ cm}$ and $12\text{ cm}$ respectively, its slant height is:
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Question

If the radius and height of a right circular cone are $5	ext{ cm}$ and $12	ext{ cm}$ respectively, its slant height is:

Accepted Answer

Slant height $l = \sqrt{r^2 + h^2} = \sqrt{5^2 + 12^2} = \sqrt{25 + 144} = \sqrt{169} = 13	ext{ cm}$.

Surface Areas and Volumes