Reservoir - spherical

The reservoir is a sphere with a diameter of 12 m. If it is painted twice, how many kg of paint is needed to paint it, and one kilogram is enough to paint about 8m²?

Final Answer:

m =  113.0973 kg

Step-by-step explanation:

$$\begin{gathered} D=12\text{m} \\ n=2 \\ \sigma =8/n=8/2=4{\text{m}}^2\text{/kg} \\ r=D/2=12/2=6\text{m} \\ S=4\pi \cdot r^2=4\cdot 3.1416\cdot 6^2\doteq 452.3893{\text{m}}^2 \\ m=S/\sigma =452.3893/4=113.0973\text{kg} \end{gathered}$$

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