Odpowiedź:
[tex]Vg = Pp \times h = {a}^{2} \times h \\ 42= a^2 x h\\ Vo = \frac{1}{3} Pp \times h = \frac{1}{3} {a}^{2} \times 3h = {a}^{2} \times h \\ Vo=Vg=42 cm^3 [/tex]
