Ellardorado's answer to clementia's Junior College 2 H2 Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Ellardorado
Ellardorado's answer
20 answers (A Helpful Person)
From y=f(x) rewrite as x=h(y), then required integral is pi×x^2 from y1 to y2