Question 756315
I wasn't sure whether you wanted the silo
painted inside and out, so I did both!
Formula for Surface area = 2 pi rh
Outside wall => 2 * pi * 2.6 * 12 = 196.04m^2
     196.04 m^2 / 14 m^2 = 14 cans
           14 cans @ $15.98 = $223.72.

Inside wall   (Radius = 2.6 - 0.52 = 1.08m)
           => 2 pi rh
           => 2* pi * 1.08 * 12 = 81.43 m^2
             81.43 m^2/ 14 m^2 = 5.8 (Say 6)
            6 cans @ $15.98 = $95.88

  Therefore Outside wall will require 14 cans
  and cost $223.72
            Inside wall will require 6 cans
  and cost $95.88
 Total to do both inside and out = $319.6
Hope this helps.
:-)