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1m^3-0.7t
0.12m^3-x
x=(0.12m^3*0.7t)/1m^3=0.084t
zamieńmy wymiary na m (1m =100cm)
0,1X0,4X3
V = 0,1*0,4*3 = 0,12 m³ ------------objętość beli
0,12 * 700 kg = 84 kg ==========>to waga naszej beli drewna