Odpowiedzi

2010-01-31T14:13:19+01:00
Pp = 0,5m²
h = 2m
d = 270 kg/m³
V = Pp * h
V = 0,5m² * 2m = 1m³
d = m/V
m = d * V
m = 270kg/m³ * 1m³ = 270kg