a) 2,7g/cm cub= 2.7g/0.000001 m cubi=2700000g/m cub=2700kg/m cub Adevarat
b) 1kg/dm cub= 1kg/0.001 m cubi=1000 kg/m cub Adevarat
c) 2,5kg/dm cub=2500g/dm cub=2500g/1000cm cubi=2500000g/m cub Fals
d) 7800 kg/m cub=7800000 g/1000000cm cubi= 7800000000000g/cm cub Fals