- #1
OmniNewton
- 105
- 5
Homework Statement
Find the volume of the solid obtained by rotating y=x^2 and x = y^2 about y=2
Homework Equations
V= 2πrh
The Attempt at a Solution
When I had constructed the graph I determined the following:
r= 2-(y(1/2))
h= 1-y2
after converting V into an integral I applied fundamental theorem of calculus.
2-2y^2-y^(1/2) + y^(5/2)
evaluating the expression from lower limit =0 to upper limit = 1
I obtained a value with a denominator of 21.
The final answer I should receive is 31π/30 (I proved this by disk method and this is the stated answer).