21. Find the height and the curved surface area of the frustum

The slant height of a frustum of a cone is 10 \(cm\). The diameter of the lower and upper circular ends are 26 \(cm\) and 14 \(cm\). Find the height and the curved surface area of the frustum. [Use \(\pi = 3.14\)]

 

Height of the frustum of a cone \(=\)  \(cm\)

 

Curved surface area of the frustum of a cone \(=\)  \(cm^2\)