16. Find the surface area of the funnel

A 30 \(cm\) lengthy funnel is in the form of a frustum surmounted on a cylinder. The base radius of the cylinder is 3.9 \(cm\) and the height of the frustum is \(9\) \(cm\). If the top radius of the funnel is 7.8 \(cm\), then find the outer surface area of the funnel.

 

Answer:

 

The outer surface area of the funnel \(=\)  \(cm^2\)

 

[Note: Enter the answer up to two decimal  places.]