The density of a substance is given as the ratio of its mass and density. In mathematical terms,

Density = mass/volume.

Since mass has units of grams or kilograms, and volume has common units of mL, L or m^3; the units of density are gm/ml, g/cm^3 or kg/m^3.

In the...

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The density of a substance is given as the ratio of its mass and density. In mathematical terms,

Density = mass/volume.

Since mass has units of grams or kilograms, and volume has common units of mL, L or m^3; the units of density are gm/ml, g/cm^3 or kg/m^3.

In the given case, the mass of marble block is given as 876 gm and its volume is 220 cm^3. The density of the marble block is, thus

Density = mass/volume = 876/220 g/cm^3

= 3.98 gm/cm^3

The density is 3.98 gm/cm^3.

Another term related to density, is the specific gravity of a substance. It is given as the ratio of density of the substance to that of water. Since the density of water is about 1 g/cm^3, the specific gravity of the given marble block is 3.98.

Hope this helps.