Answer :
Density is defined as mass per unit volume. The next thing Natasha should do in order to determine the densities of the objects is to measure the volume of each object.
To obtain the density of an object, we have to obtain its mass and its volume. This is because density is defined as mass per unit volume.
Since Natasha already has the mass of the cubes as 400 g, 378 g and 412 g, she must now proceed to obtain the volumes of the respective cubes in order to obtain their density.
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