π*[ (∫(8-8y/5)^2 dy from y=-5..5) - (∫(-16-32y/5)^2 dy from y=-5..-5/2) ]

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.