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Question

The diameter of a cone is $14 c m$ and its slant height is $9 c m$ . Find the area of its curved surface.

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Solution

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Curved surface area $= S = π r l$

Given, $r = 7, h = 9$

$S = \frac{22}{7} \times 7 \times 9 = 198$ $c m^{2}$

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