Odpowiedzi

2010-02-15T18:10:08+01:00
Pc = 2Pp + Pb
Pp=½ e×f
Pp= ½×6×8=24
H= 5×3 =15
Pb= 4×a×H
Pb= 4×5×15 = 300
Pc= 2×24 + 300 = 348 cm²