Answers:
13. 3.14cm
14. 452.38in
15. 1244.07cm
16. 1072.33in
Explanation:
I assumed I was solving for volume since the other problems were being solved for volume as well.
13. The formula for the volume of a cone is 1/3×pi×the radius^2× height
The radius is 1 since radius is half the diameter. We multiply 1/3×pi×(1)^2×(3) is equal to pi which is approximately 3.14. Therefore, the volume of this cone is about 3.14cm.
14. We use the same formula from #13. The radius is 6 since 6 is half of the diameter 12. We have 12 for the height. Multiply 1/3×pi×(6)^2×12 which is equal to 144pi which is approximately 452.38. Therefore, the volume of this cone is about 452.38in.
15. The formula for the volume of a cylinder is pi×radius^2×Height. The radius is 6 and the height is 11. Multiply pi×(6)^2×11 which is equal to 396pi which is approximately 1244.07. Therefore, the volume of the cylinder is about 1244.07cm.
16. We use the same formula from #13. Our radius, which is already given to us, is 8 and the height is 16. We multiply 1/3×pi×(8)^2×16 which is equal 1024/3pi which is equivalent to 1072.33. Therefore, the volume of this cone is about 1072.33in.