The volume of the cube of unknown substance is . The length of one side of the cube is 9 cm
<u>Explanation:</u>
As per the formula of mass and density, Mass / Density equals to volume. Therefore as the mass of the cube was given to be 81 g and the density of the cube is known to be 3.0 g/,, to help Bill find out the volume. It is the ratio of mass and density and can be calculated as
As it is a cube, the volume is product of length, breadth, and height. Here, all sides are same as it is the cube.