Question 749336
You don't say whether it is a closed cylinder top and bottom
but I will calculate it as if it is:
Surface Area = 2pir^2 + 2pirh

        = 2*pi*9^2 + 2*pi*9*6 (* is times)

          = 508.938 + 339.292

                = 848.23 ft^2

If it is open ended then the answer is just:
               = 339.292 ft^2