We would determine the amount of soil by applying the formula for determining the volume of a cylinder which is expressed as
Volume = pi x radius^2 x height
From the information given,
Width of the cylindrical pot = 8
This is the same as the diameter of the pot
We know that
radius = diameter/2
Thus,
radius = 8/2 = 4
height = depth = 40
pi = 3.14
Thus,
Volume = 3.14 x 4^2 x 40
Volume = 2009.6
The voulme of soil needed to fill the pot is 2009.6 cubic inches