Answer
See explanation
Work Step by Step
We know that density is mass per unit volume -
=> $density = \frac{mass}{volume}$
=> $mass = density \times volume$
also,
$volume = \frac{mass}{density}$
Therefore density is mass per unit volume so if we know the volume of an object we can calculate the mass by multiplying volume with density. Also if we know the mass of an object we can calculate it's volume by dividing mass by density.
