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October 22, 2014

October 22, 2014

Posted by **Liz** on Sunday, June 3, 2012 at 6:21pm.

- Calculus -
**Steve**, Sunday, June 3, 2012 at 9:03pmIf we include the area out to x = -2, we have

v = ∫[0,6] πr^2 dy

where r = 2+x = 2+(6-y)/3 = 4-y/3

v = π∫[0,6](4-y/3)^2 dy = 56π

But we have to subtract out the interior cylinder of radius 2 and height 6, or 24π, leaving us with just 32π generated by the rotating triangle.

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