Answer:
300 cubic Inches
Explanation:
Since idendtiacls we really only need to solve one of them 
so to find a volume of a triangular prism 
I’d just find the base and multiply but the lenght or height 
SO in this case the base is 6*5/2 so 15
Now there 10 of those 15 in bases
SO multiply to find total 
10*15=150 
Now 150*2 becuase the bottome one is basically the same so that’d give you 300