how do i do this please

Answer:I got 3,004.43 (could be wrong but should be right)
Step-by-step explanation:So I found the volume of the prism which is (20 times 20 times 35) and subtracted the cylinders (screw) volume from that which was 10,995.57 (pi times radius squared= volume for cylinder) which gave me the volume left around 3 thousand!