What is the volume of the two combined?

I think it is 72ft^3 because I am sure the top part is 13 x 2 x 2 since the side of it is a square, and the equals 52 

Then the bottom part is 5 x 2 x 2 which equals 20

And 52 + 20 = 72 

So the answer is 72 ft cubed or 72^3

Jus solve them and add them together

The correct answer is -20y