Question 1179966
height of fence post 5 ft
diameter of fence post = 1 ft radius = 0.5 ft

Total surface of the fence post = 2pir(r+h)

= 2* 3.14 *(5+0.5)

= 6.28 * 5.5

= 34.54 ft^2 / post

For 10 
345.4 ft^2

How much paint /ft^2