Answer :
[tex]\begin{gathered} \text{Volume of a sphere is = }\frac{4}{3}\times\pi\text{ }\times r^3\text{ Note, r = D/2 = 1/2 = 0.5} \\ \text{ =}\frac{4}{3}\times\frac{22}{7}\times(0.5)^3 \\ \text{ =}\frac{11}{21}\text{ =}0.523ft^3 \end{gathered}[/tex]