Answer:
Height or x is 4.50 feet.
Step-by-step explanation:
Surface area is given as : 
Volume is given as : 
The value of the surface area of the cylinder is equal to the value of the volume of the cylinder. This means:
= 
Diameter is given as :
feet
So, radius =
feet
height = h
SA = 
=
feet square
Volume = 
= 40.70h cubic feet
Now as SA= volume ; we will equal both and solve for h;

=> 
=> 
h = 4.50 feet
Hence, height or x is 4.50 feet.
So, SA = 183.12 square feet
Volume = 183.12 square feet