Question

The curved surface area of a right circular cone is 660cm2 and its slant height is 30 cm...find its radius

Answer 1

The curved surface area of the right circular cone is given by the formula= $\pi rl$ where 'l' is the slant height and 'r' is the radius.

Since, it is given that the curved surface area of the right circular cone = 660$cm^2$ and slant height as 30 cm.

We have to determine the radius of the right circular cone.

$\pi rl = 660$

$\frac{22}{7} \times r \times 30 = 660$

$\frac{660}{7} \times r = 660$

r = 7 cm

Therefore, the radius of the right circular cone is '7' cm.