18. Find the surface area of the test tube

If the height of the test tube is \(12.9 cm\) and its radius is 3.5 \(cm\), then find the total surface area of the test tube. [Hint: Use \(\pi = \frac{22}{7}\).]

 

 

Answer:

 

The total surface area of the test tube \(=\)  \(cm^2\)

 

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