I will help you but I need to know what you need help with , find the area or volume?
Answer:
Minimum value of function
is 63 occurs at point (3,6).
Step-by-step explanation:
To minimize :

Subject to constraints:

Eq (1) is in blue in figure attached and region satisfying (1) is on left of blue line
Eq (2) is in green in figure attached and region satisfying (2) is below the green line
Considering
, corresponding coordinates point to draw line are (0,9) and (9,0).
Eq (3) makes line in orange in figure attached and region satisfying (3) is above the orange line
Feasible region is in triangle ABC with common points A(0,9), B(3,9) and C(3,6)
Now calculate the value of function to be minimized at each of these points.

at A(0,9)

at B(3,9)

at C(3,6)

Minimum value of function
is 63 occurs at point C (3,6).
Answer:
a hollow cylinder
Step-by-step explanation:
the answer is a hollow cylinder
since the revolution only takes care of the curved surface area
Hi mate!
The answer after simplifying is: 2x^2-6x+7
Please let me know if you need further assistance! Have a terrific evening.
~Brooke❤️
C
I think this is the right answer