Question

A substance of mass 0.4kg having a density 2700kg/m3 occupies an area 0.02m2. Determine the thickness of the substance.

Answer 1

Given data

Density of substance is $\rho=2700 kg/m^3$

Area is $A=0.02 m^2$

The expression for the density of the substance is

$\rho=\frac{m}{At}$

So the thickness of the substance is

$t=\frac{m}{\rho A}=\frac{0.4}{(2700)(0.02)}=7.41*10^{-3} m$