Answer:
Total surface area of cone = 316.355 ft²
Step-by-step explanation:
Given:
Slant height of cone (l) = 9 feet
Radius of cone (r) = 6.5 feet
Find:
Total surface area of cone.
Computation:
Total surface area of cone = πr(l+r)
Total surface area of cone = (3.14)(6.5)(9+6.5)
Total surface area of cone = (3.14)(6.5)(15.5
Total surface area of cone = 316.355 ft²