How do you find the volume of the region bounded #y = x²# and #y =1# is revolved about the line# y = -2#?
1 Answer
Oct 7, 2015
See the explanation.
Explanation:
Here is the region (in blue) with the line
A representative slice in black and the two radii (vertical red lines).
The volume of a washer is
Where
In this question,
Expand the polynomial integrand and evaluate to get: