Hi,

I have this problem:

the surfaces r=2 and 4, 30 degrees and 50 degrees, 20 degrees and 60 degrees identify a closed surface.

1- find the enclosed volume.

2- Find the total area of the enclosedsurface. ( I think it is a typo from the teacher. It isvolumenot surface)

The first question is straigth forward

For the secon question I have some issues.

Do I need to take take each element of surface (in spherical coordinates)

,dS1=

dS2=

dS3=

then integrate the according the limits and the total are should be

S= S1+S2+S3

Is my reasonnig correct?

Thank you

B