<PRE><B>Question 1036249</B>
We know that once we have the base and the wall, we have a smaller cylinder.

Our base will be a circle with a diameter that is .15 meters shorter. The number .15 is calculated by converting millimeter to meter.
Therefore our circular base will have a diameter of 5.4 - .15 = 5.25 meters

The height will be also shorter due to concrete. The new height is 2.16 - .2
We go .2 by converting the millimeter  to meter 
Therefore shorter height is 2.16 - .2 = 1.96 meters

Now the volume of this smaller cylinder is pi*r^2*height
We know that the diameter is 5.25. The radius is half of this number which is 2.625
Volume = pi*2.625^2*1.96 The number of pi is around 3.14 </PRE>