EXPLANATION
Let's see the facts about the triangular prism:
Base= 5 units
Length = 4 units
Diagonal 3 units
The volume of a triangular prism os given by the following relationship:
[tex]\text{Volume}=\frac{1}{2}\cdot base\cdot length\cdot height=\frac{1}{2}\cdot5\cdot4\cdot3=\frac{1}{2}\cdot60=30units^3[/tex]The answer is 30 cubic units.