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m=Vd=10m3*700kg/m3=7000kg
V = 5 * 2 * 1
V = 10m³
m = Vd
m = 10m³ * 700kg / m³
m = 7 000 kg
Odp. : Masa drewnianego klocka wynosi 7000kg.
Pozdrawiam :)