When computing the surface aera? Why do we must consider the thing to be frustums, Why can't we consider the thing to be a little cylindrical?

Question

anonymous · Answer

Little cylindrical shapes, will have grab between them and it makes calculations harder. You can do it, but it's going to be rough.

anonymous · Answer

thank you, but when we take the limit of cylindrical , the gap between them will dispear, right?

anonymous · Answer

yes, i shouldn't have said that, you are correct. I will just make life a lot harder.

anonymous · Answer

dear wellington , do you have a skype? are you a student in university?

anonymous · Answer

Actually, yes. What is your major and math leve?

anonymous · Answer

my major is astrophysics, and I am a phD student. I am Chinese. My skype is erxinyue

anonymous · Answer

what math are you in?

anonymous · Answer

I preview the calculus, And this problem rises when I study the chapter of " Application of integration".

anonymous · Answer

hmm.. i see