The length of rectangular pyramid is l = 5 feet.
The width of rectangular pyramid is w = 4 feet.
The height of rectangular pyramid is h = 9 feet.
The formula for the volume of rectangular pyramid is,
[tex]V=\frac{l\cdot w\cdot h}{3}[/tex]
Since there are two rectangular pyramid so net volume of figure is,
[tex]V^{\prime}=\frac{2}{3}\cdot l\cdot w\cdot h[/tex]
Substitute the values in the formula to obtain the volume of figure.
[tex]\begin{gathered} V^{\prime}=\frac{2}{3}\cdot5\cdot4\cdot9 \\ =10\cdot4\cdot3 \\ =120 \end{gathered}[/tex]
So volume of figure is 120 feet cube.
