The oil tank

The oil tank in the factory hall has the shape of a cylinder 8 m high and 4 m in diameter. It is three-quarters full. How much oil is in it?

Correct answer:

V =  75.3982 m³

Step-by-step explanation:

$$\begin{gathered} h=8\text{m} \\ D=4\text{m} \\ r=D/2=4/2=2\text{m} \\ q=\frac{3}{4}=0.75 \\ V=q\cdot \pi \cdot r^2\cdot h=0.75\cdot 3.1416\cdot 2^2\cdot 8=75.3982{\text{m}}^3 \end{gathered}$$

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