Odpowiedzi

2010-03-30T19:40:23+02:00
Vz = 0,2*0,2*4,5= 0,18
Vd = 200*5*20 = 20000
Vd/Vz = 20000/0,18 ≈111111
3 4 3
2010-03-30T19:42:21+02:00
2mm x 2mm x 4,5cm = 80mm = 8cm

2m x 5cm x 20cm = 20 000cm

20 000 : 8 = 2500
2 3 2