Hi all! I hope all is well. I am struggling with this problem:

The base of a solid is the unit circle x^2 + y^2 = 4, and its cross-sections perpendicular to the x-axis are rectangles of height 10. Find its volume.

I know I need take the integral of the area of the rectangle, so I what I did was A=lw, A=10*sqroot(x^2-4), but when I integrate that it doesn't work out! Any help would be appreciated! Thanks!

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