Answer:
I guess the figure is like this = 840cm^3
Step-by-step explanation:
[The prism can be divided into two rectangular prisms, one at the top with dimensions 5×4(=12-8)×6 and the other one at the bottom with dimensions 15×6×8]
Area of first prism = 5×4×6=120cm^3
Area of second prism = 15×6×8=720cm^3
Then volume of conplete prism is 120+720=840cm^3
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