Odpowiedzi

2010-03-08T15:53:06+01:00
24 cm
55mm=5,5cm
2 dm=20cm

P=24*5,5*2+20*5,5*2+20*24*2cm²
P=1444cm²
2010-03-08T15:59:49+01:00
A = 24 cm
b = 20 cm
c = 5.5 cm

Pc =2 x 24 cm x 20 + 2 x 24 cm x 5.5 cm + 2 x 20 cm x 5.5
= 960 cm + 264 cm + 220 cm = 1426 cm2 = 142,6 dm