To answer this question we will use the following formulas to compute the volume of a rectangular prism and a cylinder:
![\begin{gathered} V_(prism)=length* width* height, \\ V_(cylinder)=\pi* radius^2* height. \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/d8iy2k5ejckk5dtvwzm6aslxw2wset59k6.png)
From the given diagram we get that the length of the rectangular prism is 24ft, its width is 16ft and its height is 20ft, therefore its volume is:
![V_(prism)=24ft*16ft*20ft=7680ft^3.](https://img.qammunity.org/2023/formulas/mathematics/college/djqvwiu4fmzwv2p1o6n5ji91dco9gsdjtg.png)
Also, from the given diagram we get that the radius of the cylinder is 4ft and its height is 20ft, therefore its volume is:
![V_(cylinder)=\pi*(4ft)^2*20ft=80\pi ft^3\approx251.3ft^3.](https://img.qammunity.org/2023/formulas/mathematics/college/d6vri6g5peqd3wtax3ajfa0veab8dskpt6.png)
Then:
![7680ft^3-251.3ft^3=7428.7ft^3](https://img.qammunity.org/2023/formulas/mathematics/college/kjmw0csjm1qvw3k3vres3xc26t1c2tji4i.png)
Answer:
![7428.7ft^3.](https://img.qammunity.org/2023/formulas/mathematics/college/fbmnpcmwa9gjjgvad2d5b19pixdtkryol1.png)