Question

A rock occupies a volume of 20 cm3 and has a mass of 100 g. Find the density of Answer:_____________ this rock.

Answer 1

The density of rock = 5 g/cm³

Further explanation

Given

Volume of rock=20 cm³

Mass = 100 g

Required

Density

Solution

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

The unit of density can be expressed in g/cm³ or kg/m³  

Density formula:  

$\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}$

ρ = density  

m = mass  

v = volume  

Input given values in formula

$\tt \rho=\dfrac{mass~of~rock}{volume~of~rock}=\dfrac{100~g}{20~cm^3}=5~g/cm^3$