Answer:
Object A has the greater volume by 1.6 cm³.
Step-by-step explanation:
Density = mass / volume
Solving for volume:
Volume = mass / density
For object A:
V = 12 g / (3 g/cm³)
V = 4 cm³
For object B:
V = 12 g / (5 g/cm³)
V = 2.4 cm³
Object A has the greater volume by 1.6 cm³.