Posted by **Pan** on Saturday, March 29, 2008 at 2:23am.

Find the volume of the solid generated by revolving the region bounded by the graphs of the equations about the x-axis.

y=ln x, y=0, x=1, x=3

Please show the steps in your work, thanks! :)

- Calculus -
**drwls**, Saturday, March 29, 2008 at 2:51am
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.

- Calculus -
**drwls**, Saturday, March 29, 2008 at 2:57am
This may help you doing the integration:

http://www.karakas-online.de/forum/viewtopic.php?t=4026

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