question

$V=\pi r^2h_b + \frac{1}{3}\pi r^2 h_t\\ 72\pi=\pi r^2*9 + \frac{1}{3}\pi r^2 *9\\ 72\pi=\pi r^2*9 + \pi r^2 *3\\ 24= r^2*3 + r^2\\ 24= 4r^2\\ 6= r^2\\ r=\sqrt{6}\;units$

Alan wrote this to show people how to upload pics.

I learned how to do it from here.

http://web2.0calc.com/questions/ven-diagram-need-help-for-questions#r3

Lately I have been including this with my wrap ever time so it is easy to find.

The wrap "What is happening: Wrap#4"  is in with the sticky thread.

I have not answered the question I have only uploaded the pic. 

thanks Melody! very easy question i just didn t red the question carefully

Hi Solveit,

What I want you to learn from my answer is how to post pictures  >:)

CPhill :D