Final answer:
The solid will float in water because its density of 500 kg/m³ is less than the density of water, which is 1000 kg/m³.
Step-by-step explanation:
To determine whether the solid will sink or float in water, we need to compare the density of the solid to that of water. The density of the solid is calculated by dividing its mass by its volume. The density of the solid is 500 kg/m³ (2000 kg / 4 m³). Since the density of water is 1000 kg/m³, and the density of the solid is less than the density of water, the solid will float.