Question

find the curved surface of a right circular cone whose diameter of the base is 10 and height is 12​

Answer 1

curved surface are of cone =

$\pi \: r \: l$
${l}^{2} \: = {12}^{2} + {5}^{2}$
${l}^{2} = 144 + 25$
${l}^{2} = 169$
$l = 13$


$curved \: surface \: area = \pi \: r \: l$
$22 \div 7 \times 5 \times 13$
$204.28 {cm}^{2}$
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