Surface area of a sphere is 4Pi R^2 = Pi D^2 D=R/2 so D^2 = R^2 / 4
The integral of the surface area is the volume:
So 4/3 Pi R^3 which is right which goes to Pi D^3 / 6 which is also correct.
But integrating the original expression for area with diameter gives Pi D^3 / 3 which is wrong... why?
Can you only integrate this using the radius?
Volume of a sphere Watch
- Thread Starter
- 19-12-2010 12:55
Last edited by RichE; 19-12-2010 at 16:27.
- 19-12-2010 16:26