Odpowiedź :
Hej!
a = 3 cm
b = 1 dm = 10 cm
c = 8 cm
V = a * b * c
V = 3 cm * 10 cm * 8 cm
V = 240 cm³
P = 2(ab + bc + ac)
P = 2(3 cm * 10 cm + 10 cm * 8 cm + 3 cm * 8 cm)
P = 2(30 cm² + 80 cm² + 24 cm²)
P = 2 * 134 cm²
P = 268 cm²
Pozdrawiam! - Julka