Question

Density is equal to ______________.

• A. mass per unit volume
• B. volume per unit mass
• C. mass of a body
• D. volume of a body

Answer 1

The correct option is A

mass per unit volume

1. A material’s density is defined as its mass per unit volume.
2. Density is essentially a measurement of how tightly matter is packed together.
3. Mathematically we can say that,$density=\frac{mass}{volume}$
4. The SI unit of mass is the kilogram ( $Kg$) and Volume is $cubicmetre\left(m^3\right)$.
5. Thus, the SI unit of density is $Kg/m^3$, for convenience, we use $g/c{m}^3$ for solids, $grampermillilitre(g/ml)$ and for liquids, and $gramperlitre(g/L)$ for gases.

Hence, the correct answer is option A. Density is equal to mass per unit volume.