a)
Objętość
[tex]5cm \\ 2dm = 20cm \\ 4mm = 0.4cm[/tex]
Zatem
[tex]5cm \times 20cm \times 0.4cm = 100 {cm}^{2} \times 0.4cm = 40 {cm}^{3} [/tex]
Pole powierzchni
[tex]5 \times 20 = 100 {cm}^{2} \\ \\ 20 \times 0.4 = 8 {cm}^{2} \\ \\ 5 \times 0.4 = 2 {cm}^{2} \\ \\ 100 + 8 + 2 = 110 {cm}^{2} [/tex]
110 cm² × 2 = 220 cm²
b)
Objętość
[tex]1.7cm \times 1.7cm \times 1.7cm = 4.913 {cm}^{3} [/tex]
Pole powierzchni
[tex]1.7 \times 1.7 = 2.89 {cm}^{2} \\ \\ 2.89 \times 6 = 17.34 {cm}^{2} [/tex]
