Disc method rotating around vertical line | AP Calculus AB | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing-and saving your progress-now: www.khanacadem...
Volume of solid created by rotating around vertical line that is not the y-axis using the disc method. Created by Sal Khan.
Practice this lesson yourself on KhanAcademy.org right now: www.khanacadem...
Watch the next lesson: www.khanacadem...
Missed the previous lesson? www.khanacadem...
AP Calculus AB on Khan Academy: Bill Scott uses Khan Academy to teach AP Calculus at Phillips Academy in Andover, Massachusetts, and heÕs part of the teaching team that helped develop Khan AcademyÕs AP lessons. Phillips Academy was one of the first schools to teach AP nearly 60 years ago.
About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything.
For free. For everyone. Forever. #YouCanLearnAnything
Subscribe to Khan AcademyÕs AP Calculus AB channel: / channel
Subscribe to Khan Academy: www.youtube.co...

[@UnlimitedExcess]

Thanks, I needed this last year, but now is fine.

[@Pasashok]

Did this last semester, but already forgot everything

[@chonylau6981]

Only your explanation I can totally understand!! Thanks!!

[@amkibb]

Shouldn't that particular solid have a cylindrical hole going through it of radius 2?
Based on your diagram there is a distance of -2 between the function and the vertical line, so if it was rotated shouldn't that gap be accounted for?

[@AlexisGarciator]

That’s what I was thinking

[@MRforBilly]

Amazing

[@DrEnginerd1]

after going through cal 3 integrals like that look ridiculously easy O_o. I didnt think that in cal 2 though

[@jaepark1593]

how do you find the limits of integration?

[@danny87573]

*Gumdrop shape*

[@lauraschulte8196]

god bless you

[@jkattz1]

hello

[@noriohasegawa7397]

6th

[@omjai15]

5Th comment!

[@jkattz1]

YOU WILL NEVA BE FIRST, MUAHAHA okaynevaminebye