ANSWER
a. 226m³
Step-by-step explanation
The volume of a cylinder is calculated using the formula:
![Volume=\pi \: {r}^(2) h](https://img.qammunity.org/2020/formulas/mathematics/high-school/hw43i1p7o7dck0bnwuvwyig2u18qdy5igt.png)
where r is the radius and h=8m is the height of the cylinder.
The radius is half of the diameter.
This means that:
![r = (d)/(2) = (6)/(2) = 3m](https://img.qammunity.org/2020/formulas/mathematics/high-school/hqr7bagpfmd0xjgy7ys03ncfph7wrmv1kv.png)
We plug in the values into the formula to get:
![Volume=\pi * {3}^(2) * 8](https://img.qammunity.org/2020/formulas/mathematics/high-school/fug7ysfsiv3me52zprgjfmw948igcj0yz8.png)
![Volume=72\pi](https://img.qammunity.org/2020/formulas/mathematics/high-school/t2fnzujn2dk7m27dhw88fceam7cem4f6zh.png)
![Volume=226.19 {m}^(3)](https://img.qammunity.org/2020/formulas/mathematics/high-school/ewd31aj0gocu8wwc59pefktzzbu493clpe.png)
To the nearest cubic meters, the volume is 226 m³.