Find the slant height of a cone whose height is $12 c m$ and dimeter $10 c m$ .

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Solution

Let slant height= $L$ ,
Height= $H = 12 c m$
diameter= $10 c m$ ,

so, radius is= $R = 5 c m$

$L^{2} = R^{2} + H^{2}$
$L^{2} = 5^{2} + 12^{2}$
Therefore, $L = 13 c m$

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