4. Find the height of the frustum

The slant height of a frustum of a cone is 10 \(cm\). If the diameter of the lower and upper circular ends are 26 \(cm\) and 14 \(cm\), determine the height of the frustum.

 

The height of the frustum of a cone \(=\) \(7\) \(cm\)\(8\) \(cm\)\(12\) \(cm\)\(10\) \(cm\)