Hi,I need your help.I have to do one mathematical task:Volume of proper octogonal prism is 8 cm^3,and height of the prism is sqrt(2)+1.Find surface of prism.

Hi,I need your help.I have to do one mathematical task:Volume of proper octogonal prism is 8 cm^3,and height of the prism is sqrt(2)+1.Find surface of prism

$$\small{\text{ Volume $V=8\ cm^3$ and height $h=(1+\sqrt{2})\ cm$. Surface $=2\frac{V}{h}+4\sqrt{2hV(\sqrt{2}-1)}=6.62741699797+16=22.6274169980\ cm^2$ }}$$