Posted by fifi on Sunday, May 27, 2012 at 11:17pm.
The area enclosed between the xaxis, the curve y=x(2x) and the ordinates x=1 and x=2 is rotated through 2π radians about xaxis. (
a)Calculate the volume of the solid revolution formed.
(b)Calculate the rotating area.

calculus  Reiny, Sunday, May 27, 2012 at 11:23pm
I did the same question this morning
http://www.jiskha.com/display.cgi?id=1338115255