2.
Determine the curved surface area of the frustum
Question:
4 m.
The perimeters (circumference) of circular ends of the frustum of a cone are 20 \(cm\) and 12 \(cm\), and the slant height is 9 \(cm\). Find the curved surface area of the frustum.
The curved surface area of the frustum \(=\) \(cm^2\).
