[tex]3 {h}^{2} = 125 \\ \\ {h}^{2} = \frac{125}{3} \\ \\ {h}^{2} = \frac{125}{3} \times \frac{3}{3} = \frac{375}{9} \\ \\ [/tex]
[tex]h = \sqrt{ \frac{375}{9} } = \frac{ \sqrt{375} }{ \sqrt{9} } = \frac{ \sqrt{25 \times 15} }{ \sqrt{9} } = \frac{5 \sqrt{15} }{3} [/tex]
