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 enclosed surface. ( I think it is a typo from the teacher. It is volume not 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)
then integrate the according the limits and the total are should be
Is my reasonnig correct?