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Ce masa are un cub de sticla fara goluri in interior .Cu latura 12cm .
Densitatea sticlei 2500km/m3


Răspuns :

ρ=2500kg/m^3
l=12cm

ρ=m/V => m= ρ*V
V=(12cm)^3=1728cm^3

m= 2500kg/m^3 * 1728cm^3=2500*1728kg= 4320000kg