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d(gęstość)=m(masa)/V(objętość)
m=d*V
m=57900g.=57,9kg.
3000 cm3 * 19,3 g= 57900 g.
V=30cm*10cm*10cm
V=3000cm³
19,3g/cm³
19,3g*3000=57900g
1kg=1000g
57900:1000=57,9kg
odp.sztabka złota waży 57,9kg