The unit of density is:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. kilogram per cubic metre.
Density is defined as the mass of a substance per unit volume. The standard unit of density in the International System of Units (SI) is kilogram per cubic meter (kg/m³). This means density expresses how much mass (in kilograms) is contained in a given volume (in cubic meters). For example, water has a density of approximately 1000 kg/m³. Sometimes, density is also expressed in grams per cubic centimeter (g/cm³), especially in chemistry. Understanding density helps distinguish materials and is crucial in physics, engineering, and many applied sciences.
Other Options:
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metre squared: Unit of area, not density.
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kilogram metre per second: Unit related to momentum or force, not density.
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metre cubed: Unit of volume, not density.