[tex]D=45 \\ D\to 2R \\\\ 2R=45 \\\\ R \to \frac{45}{2} \\\\\\ \boxed{V=\frac{4\pi R^2}{3}} \\\\\\ V=\frac{4\pi (\frac{45}{2})^2}{3} \\\\ V=\frac{\not 4 \pi * \frac{2025}{\not4}}{3} \\\\ V=\frac{\not2025\pi}{\not3} \\\\\\ \underline{\boxed{V=675\pi}}[/tex]
