few little grey areas:

1) how would i work this one out:

find the vloume generated by rotationg the area bounded by y=x^2 and y=4 around the line y=1

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- Aug 22nd 2007, 06:17 AMAmanda-UKbits n bobs
few little grey areas:

1) how would i work this one out:

find the vloume generated by rotationg the area bounded by y=x^2 and y=4 around the line y=1 - Aug 22nd 2007, 07:38 AMThePerfectHacker
It is the same as rotating $\displaystyle (x+1)^2$ around $\displaystyle y=0$. Use the volume of rotation formula.

- Aug 22nd 2007, 08:44 AMAmanda-UK
- Aug 22nd 2007, 08:56 AMRebesques
$\displaystyle \int_a^b \pi f^2(x)dx$.

- Aug 22nd 2007, 09:04 AMThePerfectHacker
- Aug 22nd 2007, 12:19 PMRebesques
I doubt it :eek:

This random page says otherwise:

Volume of A Solid of Revolution

Are you talking about surface area maybe?