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# cone

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If the radius of the cone is 5 inches and the height of the cone is 18 inches, what is the slant height of the cone ?

Mar 18, 2021

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By pythagoras' theorem:

the slant height of the cone $$(l) = \sqrt{18^2 + 5^2}$$

$$l = \sqrt{349}$$

This means the slant height is √349 inches, or about 18.68 inches

Mar 18, 2021