Find the area of the part of cylinder x^2 + y^2 = 2ay that lies outside the cone
z^2 = x^2 + y^2.

Question

Find the area of the part of cylinder x^2 + y^2 = 2ay that lies outside the cone
z^2 = x^2 + y^2.

anonymous · Answer

@TuringTest  Hi do you know how to do this question? thx a lot!

turingtest · Answer

I'm a little unsure I did this right, do you know the answer?

turingtest · Answer

|dw:1352831101743:dw|convert this to polar coordinates

anonymous · Answer

@TuringTest  the answer is 16a^2

anonymous · Answer

i always got 8a^2, what i did is like using dS=zds and then use polar coordinates integrate from 0 to pi/2 and i got 4a^2 then multiply 2, so finally got 8a^2

anonymous · Answer

and the graph for cylinder should be at the positive x axis

turingtest · Answer

I seem to be messing this one up... I'll let you know if I make any progress.