The curved surface area of a cone having height 24 cm and radius 7 cm , is\

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Professor PC Thomas Classes · Answer

(c): We have, the height of cone, $h=24 \mathrm{~cm}$ and radius, $r=7 \mathrm{~cm}$.\ We know, that $I=\sqrt{24^{2}+7^{2}}$\ $=\sqrt{576+49}=25$\ Now, curved surface area $=\pi r l$\ \ $=\frac{22}{7} 	imes 7 	imes 25=550 \mathrm{~cm}^{2}$\