From \( \frac{2}{5} h^{5/2} = \frac{288}{25\pi} \) → \( h^{5/2} = \frac{5}{2} \cdot \frac{288}{25\pi} = \frac{720}{50\pi} = \frac{72}{5\pi} \approx \frac{72}{15.708} \approx 4.58 \)? No — mistake.