Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Priyadarshan Choursiya
in spherical coordinates https://youtu.be/a8J0vjM1gG4 in cylinder coordinate https://youtu.be/fSVat7tJh64 extra https://youtu.be/q7CvgrDcylg see attachment