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d = 8920 kg/m³
V = ?
m = d * V
V = m/d
V = 17,8kg / 8920kg/m³ ≈ 0,002m³
ro=m/V
V-objętość = ? m³
ro-gęstość = 8920 kg/m³
m- masa =17,8 kg
z tego masz, że V=m/ro = 0,002 m³
d=8920kg/m³
d=m/v
v=m/d
v=17,8/8920≈0.002
Odp. Objętość wynosi 0.002m³