# Homework Help: Integral Issue (Y-Axis) Solve for Volume

1. Sep 3, 2011

### 1joey1

Integral Issue (Y-Axis) Solve for Volume :)

1. The problem statement, all variables and given/known data
[PLAIN]http://img88.imageshack.us/img88/7091/unled4mo.jpg [Broken]

2. Relevant equations

V=
pi $\int$ $^{18}_{0}$ 1/4 (19-y)$^{2}$dy
3. The attempt at a solution

I've tried it a couple times, gotten 243/2 Pi

Any and all help would be much appreciated :)

I'm really having trouble integrating the equation above, im absolutely terrible with integrals so any help with that would be ideal

Last edited by a moderator: May 5, 2017
2. Sep 3, 2011

### lineintegral1

Re: Integral Issue (Y-Axis) Solve for Volume :)

There are two ways to integrate this (I'm not sure what would be easier for you). Try foiling out your expression or using a substitution. Can you be more specific as to what you are having trouble with?

You will certainly need to recall the power antidifferentiation rule for this problem.

3. Sep 3, 2011

### 1joey1

Re: Integral Issue (Y-Axis) Solve for Volume :)

just googled that because i wasn't sure what it was.

https://pantherfile.uwm.edu/jrb5/www/antidiff1.html

Thanks, i'll try it with this new-found knowledge :)