Answer:
Density of the rectangular object = 4 / 6 = 0.67g/cm³
Explanation:
First find the volume of the rectangular object.
Volume of the rectangular object = 3 x 2 x 1 = 6cm³.
Density of an object = mass of the object / volume of the object
Therefore,
Density of the rectangular object = 4 / 6 = 0.67g/cm³
