we know that
the volume of a rectangular prism is equal to
V=L*W*H
1) Find the volume of the first and second rectangular prism
[tex]V=2*(8*6*3)=144\ in^{3}[/tex]
2) Find the volume of the third rectangular prism
[tex]V=6*4*10=240\ in^{3}[/tex]
1) Find the total volume of the structure
[tex]V=144+240=384\ in^{3}[/tex]
therefore
the answer is
the total volume of the structure is [tex]384\ in^{3[/tex]
