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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

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