Question

Volumul unui cub cu aria bazei de 72 cm la a 2 este...

Answer 1

A= l^2 => l^2=72^2 => l=72

V=l^3 => V=l^3= 72^3=373248 cm3

Answer 2

$\it Notez\ muchia\ cubului\ cu\ \ell.\\ \\ \mathcal{A}_b =\ell^2=72 \Rightarrow\ell=\sqrt{72}=\sqrt{36\cdot2}=6\sqrt2\ cm\\ \\ \mathcal{V} =\ell^3=(6\sqrt2)^3 =216\cdot2\sqrt2=432\sqrt2\ cm^3$