Answer:
The answer is 288 cm^3.
Explanation:
Step 1
find the missing sides
all the sides are not found so you have to use subtraction to find the length of the rectangular prism by subtracting 8 from 12 you get 4.
4 is the missing length of the square. Now that we have one side of the square we know that all the other sides are 4 too. So now we have found the missing sides.
Step 2
find the volumes then add them together
the formula is V = length x width x height
So you have to substitute the numbers for both prisms in the equation.
That would be 8 x 4 x 4 = 128 cm^3
and 10 x 4 x 4 = 160 cm^3
lastly, add the two products together (160 + 128) which equals 288 cm^3.