The slant height of cone whose height and radius are $6 c m$ and $8 c m$ respectively is

10 cm

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6 cm

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8 cm

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12 cm

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Solution

The correct option is A: $10 c m$

Since height, radius and slant height makes a right angle triangle

Slant height $= \sqrt{(r^{2}) + (h^{2})}$ $= \sqrt{(8^{2}) + (6^{2})} = \sqrt{64 + 36} = \sqrt{100} = 10 c m$

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