Given:
A triangular prism with height 9 ft and triangular base.
The base of the triangle is 8 ft and the height of the triangle is 9 ft.
To find:
The volume of the triangular prism.
Solution:
Volume of the triangular prism is:

Where, B is the base area and h is the height of the triangular prism.
Area of a triangle is:

The base area of triangular prism is:



Now, the volume of the triangular prism is:


Therefore, the volume of the triangular prism is 324 cubic ft.