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Question

The formula to find the slant height of the cone.

A

$$l = \sqrt{h^2 - r^2}$$

B

$$l = \sqrt{h + r}$$

C

$$l = \sqrt{h - r}$$

D

$$l = \sqrt{h^2 + r^2}$$

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Solution

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Correct option is B. $$l = \sqrt{h^2 + r^2}$$
The slant height of the cone of height $$h$$ and radius $$r$$ is given by $$l = \sqrt{h^2 + r^2}$$

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