Question 1118060
<br>
The truncated pyramid has height 10; one base has area 10^2=100 and the other base has an area 20^2=400.  The formula for the volume of a truncated pyramid with height h and bases B and b is
{{{(1/3)h(B^2+Bb+b^2)}}}<br>
You can do the arithmetic.<br>
The square prism top has dimensions 20x20x2.  I will assume you can find its volume and thus find the total volume.