The volume

The volume of the sphere is 1 m³, what is its surface?

Correct result:

S =  4.836 m²

Solution:

$$\begin{gathered} V=1{\text{m}}^3 \\ V={\displaystyle \frac{4}{3}}\pi r^3 \\ r=\sqrt[3]{3\cdot V\mathrm{/}(4\pi )}=\sqrt[3]{3\cdot 1\mathrm{/}(4\cdot 3.1416)}\doteq 0.6204\text{ m } \\ S=4\pi \cdot r^2=4\cdot 3.1416\cdot 0.6204^2=4.836{\text{m}}^2 \end{gathered}$$

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