Question
The slant height of a right circular cone is 10 m and its height is 8 m. Find he area of its curyed surface ..
Answer: Option C
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`l = 10 m, h= 8 m, so , r = sqrt(l^2 - h^2) = sqrt((10)^2 -(8)^2)` = 6 m.
`:.` Curved surface area = `pi r l = ( pi xx 6 xx 10) m^2 = 60 pi m^2`
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