volumul unui cub=[tex]l^3[/tex]
[tex]l^3=125 \\125=5^3=>l=5[/tex]
a) l=5
b) diagonala unei fete = [tex]l\sqrt{2}=> 5\sqrt{2}[/tex]
c) aria totala =[tex]6*l^2=> 6*5^2=>6*25=150[/tex]
d) diagonala cubului = [tex]l\sqrt{3}=>5\sqrt{3}[/tex]
