Hello, kinana18!
Find the volume of the solid that results where the shaded region . Where?
is revolved about the yaxis. .
I'm not sure if you solve for x then integrate
or if you just integrate the equation as it is. I have no idea what you're talking about . . . do you?
The only region that makes any sense looks like this: Code:

3 *
\
:\
::\
:::\
::::\
:::::\
::::::\
 +    *  
 1½
We have a right circular cone with
Its volume is: .
If we must use Calculus, I suggest Cylindrical Shells.
The formula is: .
And we have: . . . . . etc.