Solution
[tex]\begin{gathered} D\text{ = 3.5} \\ r\text{ = }\frac{D}{2}\text{ = }\frac{3.5}{2}\text{ = 1.75} \\ \text{Volume of a sphere = }\frac{4}{3}\times\pi\times r^2 \\ \text{ =}\frac{4}{3}\times\frac{22}{7}\times(1.75)^2^{} \\ \text{ =}\frac{26.95}{21}\text{ =12.83} \end{gathered}[/tex]Final Answer = 12.83
