Find the

Find the radius of the circular base of the vessel, whose perimeter is 2.51 m. Write the result to one decimal place in meters.

Via the π sign - Ludolph's number

Correct result:

r =  0.4 m

Solution:

$$\begin{gathered} o=2.51\text{ m } \\ o=2\pi r \\ r=o\mathrm{/}(2\pi )=2.51\mathrm{/}(2\cdot 3.1416)=0.4\text{ m} \end{gathered}$$

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