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The height of a right circular cone is 5 cm and its base radius is 12 cm. What is the curved surface area of the cone? |
$132 \pi cm^2$ $143 \pi cm^2$ $156 \pi cm^2$ $168 \pi cm^2$ |
$156 \pi cm^2$ |
We know that, The curved surface area of the cone = π × r × l l2 = r2 + h2 We have, h = 5 cm r = 12 cm = l2 = 144 + 25 = 169 = l = 13 cm = The curved surface area of the cone = π × 12 × 13 = 156 π cm2 |
