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r = 50cm = 0,5m
V = πr² × h
v ≈ 3,14 × 0,5² × 1,2
V ≈ 0,942m³
Objętość 5 beczek: 5 × V = 5 × 0,942 = 4,71 m³
4,71 m³ = 4710 litrów
pozdro :]