## anonymous 5 years ago When finding solids of revolution (integration). Do you square y then integrate (then times by pi) or do you square the integral of pi (and then times by pi)?

1. anonymous

$\pi \left( \int\limits_{a}^{b}y \right) ^{2}$ or...

2. anonymous

$\pi \int\limits_{a}^{b}\left( y ^{2} \right)$