Cone, diameter of base 18 ft slant height 14 ft

207π ft²

Step-by-step explanation:

Given in the question,

diameter of the base = 18 ft

slant height = 14 ft

radius of the base = 18/2

= 9 ft

Formula to calculate the surface area

A = πrl+πr²

here l = slant height

r = radius of the base

plug values in the formula

A = π (9) (14) + π9²

A = 207π ft²