- #1
skyturnred
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Homework Statement
A frustum of a right circular cone with height h, lower base radius R, and top radius r. Find it's volume.
Homework Equations
We are currently learning the Method of Washers and the Method of Cylindrical Shells so I believe we are supposed to use this somehow.
The Attempt at a Solution
Here is an image of the 3d object if it helps!
If the above doesn't work use this link:
http://i.imgur.com/KibfO.png
The following is my work. The first image is my work trying method of washers. The answer I obtained is wrong. The second image is my work trying cylindrical shells. I have not attempted this answer because I only have one attempt left. Please let me know where I am going wrong!
Method of washers:
http://i.imgur.com/sCONu.jpg
Cylindrical Shells:
http://i.imgur.com/yKUmH.jpg
Thank you SO much in advance for your help!
***I ended up getting the answer. After re-checking my work (again) I found that I accidentally dropped an x.
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