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d=m/V
d=60g/30 cm3
d=2g/cm3
2)
30cm3=0,03dm3=0,03l
60g=0,06kg
0,03l - 0,06kg
3l - 6kg
3)
3kg=3000g
V=m/d
V=3000g/2g/cm3
V=1500cm3
pozdrawiam :)