I am trying to find the estimated volume of a rotational solid that is a cone. It is an estimate because I am cutting the cone into 8 cylinders, and finding the volume of each. Each cylinder is 1/2 inch tall, and their radi are as followed, 3/32, 3/8, 5/8, 7/8, 9/8, 11/8, 13/8, 15/8, and 17/8.

How would I go about setting this up so that the answer is 23.77?
I thought it was V = π r ^2(.5) ... But I'm not getting the answer 23.77. ):

Also, what is the value of each variable/reason for it being present in the equation?

Hopefully that made sense. lol
I'd really appreciate any help I can get. Thank you soooo much!~ <3
Guest Apr 15, 2012

1+0 Answers

Wait. I didn't include the fact that there are two circle faces in each cylinder, so if I'm multiplying by '2' for both the faces, and '.5' for the height, wouldn't those two cancel each other out? So would it simply be V = π r ^2 ?

Or am I way off track? Ohgosh, I'm so confused. );
Guest Apr 15, 2012

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