Answer:
53.76
Step-by-step explanation:
The volume of the triangular prism is given by

where h is the height, b is the base, and l is the length of the prism.
Now in our case h = 3.2 m, b = 4.8 m, and l = 7m; therefore, the above equation gives


which is our answer!
Hence, the volume of the triangular prism is 53.76 cubic meters.