\(d_1\) is perpendicular distance of given line from origin.
\(\mathrm{d}_1=\left|\frac{-4}{\sqrt{1^2+1^2}}\right| \Rightarrow 2 \sqrt{2} \mathrm{~m}\)
So \(|\overrightarrow{\mathrm{L}}|=\operatorname{mvd}_1 =5 \times 3 \sqrt{2} \times 2 \sqrt{2} \mathrm{~kg} \mathrm{~m}^2 / \mathrm{s} \)
\( =60 \mathrm{~kg} \mathrm{~m}^2 / \mathrm{s}\)