Diameter of a cylinder

I need to calculate the cylinder volume with a height of 50 cm and a diameter of 30 cm.

Correct result:

V =  35342.9174 cm³

Solution:

$$\begin{gathered} v=50\text{ cm } \\ D=30\text{ cm } \\ r=D\mathrm{/}2=30\mathrm{/}2=15\text{ cm } \\ V=\pi \cdot r^2\cdot v=3.1416\cdot 15^2\cdot 50=35342.9174{\text{cm}}^3=3.534\cdot 10^4{\text{cm}}^3 \end{gathered}$$

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