Calculus
posted by Pan .
Find the volume of the solid generated by revolving the region bounded by the graphs of the equations about the xaxis.
y=ln x, y=0, x=1, x=3
Please show the steps in your work, thanks! :)

Each slab of width dx of the resulting solid is a circular disc with volume
pi (ln x)^2 dx
Integrate that function from x=1 to x=3.
You do the steps. We'll be glad to critique your work. 
This may help you doing the integration:
http://www.karakasonline.de/forum/viewtopic.php?t=4026