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Homework Statement
Given a Jordan-measurable set in the yz-plane, use Fubini's Thm to derive an expression for the volume of the set in R3 obtained by revolving the set about the z-axis
Homework Equations
The Attempt at a Solution
I solved this problem very easily using change of variable formula, just by switching to cylindrical coordinates. However, we were not supposed to have learned change of variable yet. I can't see any other way to it.
Please help me