If the height of the test tube is \(13 cm\) and its radius is 2.8 \(cm\), 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 \(=\) \(cm^2\).
Answer variants:
238.8
228.8
231.8
234.8