A wooden cylinder $\text{(specific gravity}$ $=0.6$ ) of length $L$ and diameter $D$ floats in water $\text{(density}$ $1000 \mathrm{~kg} / \mathrm{m}^3$). Find out the minimum value of $D / L$ for which the cylinder floats with its axis vertical.
$\text{(Round off to three decimal places)}$
