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Answer:

here's the answer -

Explanation:

First, let's calculate the volume of the cube:

Volume of cube = (side)^3 = (15 cm)^3 = 3375 cubic centimeters (cc)

To convert cc to cubic meters (m^3), we need to divide by (100 cm/m)^3:

Volume of cube = 3375 cc = 3375 / (100)^3 m^3 = 0.003375 m^3

Next, we can calculate the density of the cube by using the formula:

Density = Mass / Volume

The mass of the cube is 1.35 kg, which we divide by the volume of the cube (0.003375 m^3):

Density = 1.35 kg / 0.003375 m^3 = 400 kg/m^3

Therefore, the density of the cubical object is 400 kg/m^3.

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