Find the curved surface area of a cone, if its slant height is 60 cm and the radius of its base is 21 cm.
Question:
Find the curved surface area of a cone, if its slant height is 60 cm and the radius of its base is 21 cm.
Solution:
It is given that:
Slant height of cone (l) = 60 cm
Radius of the base of the cone(r) = 21 cm
Curved Surface Area (C. S. A) = ?
C.S.A $=\pi r l=22 / 7 * 21 * 60=3960 \mathrm{~cm}^{2}$
Therefore the curved surface area of the right circular cone is $3960 \mathrm{~cm}^{2}$
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