Odpowiedzi

2010-01-13T19:10:54+01:00
Pp = 1/2 * 6 * 8 = 1/2 * 48 = 24(cm2)
Pb = 4 * (20 * 5) = 400(cm2)
Pc = 24cm[2] * 2 + 400cm[2] = 48 cm[2] +400cm[2] = 448cm[2]