Question

Please help me solve. The answer I have is incorrect which is 527.5

Answer 1

527.8 m³

1) Let's find out the Volume of the biggest cylinder then subtract from it the smaller one.

Big Cylinder Volume:

`\begin{gathered} V=\pi\cdot r^2\cdot h \\ V=\pi\cdot9^2\cdot3 \\ V=243\pi\approx763.4m^3 \end{gathered}`

The Small one:

`\begin{gathered} V=\pi\cdot5^2\cdot3 \\ V=75\pi m^3 \end{gathered}`

Subtracting 75π from 243π we have:

V=243π -75π =168π approximately 527.7875658 to the nearest tenth: 527.8 m³