Posters

A column with posters in the form of a cylinder is 2 m high, and its diameter is 1.7 m. What is the area in which it is possible to stick posters?

Correct answer:

S =  10.68 m²

Step-by-step explanation:

$$\begin{gathered} D=1.7\text{m} \\ h=2\text{m} \\ r=D/2=1.7/2=\frac{17}{20}=0.85\text{m} \\ o=2\pi \cdot r=2\cdot 3.1416\cdot 0.85\doteq 5.3407\text{m} \\ S=o\cdot h=5.3407\cdot 2=10.68{\text{m}}^2 \end{gathered}$$

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