The figure appears to be a rectangular prism with the following dimensions:
Length = 12 inches
Width = 2 inches
Height = 3/4 inch
To be able to find the volume, we will be using the following formula:
[tex]\text{ Volume = L x W x H}[/tex]Where,
L = Length
W = Width
H = Height
We get,
[tex]\text{ Volume = L x W x H}[/tex][tex]\text{ = 12 x 2 x }\frac{3}{4}[/tex][tex]\text{ = }\frac{\text{ 12 x 2 x 3}}{4}[/tex][tex]\text{ = }\frac{72}{4}[/tex][tex]\text{ Volume = 18 in}^3[/tex]Therefore, the volume of the solid is 18 cubic inches.