Question

A cone has a base radius of 9 ft. and a slant height of 16 ft. Which of the following correctly calculates the surface area of the cone? Use π≈3.14
.(1 point)
Responses

706.5 ft.2

706.5 ft. squared

254.34 ft.2

254.34 ft. squared

900.6 ft.2

900.6 ft. squared

452.16 ft.2

Answer 1

Surface area = πr(r + l) = π·9(9 + 16) = 225π ≈ 225·3.14 = 706.5 ft².

So the correct choice is 706.5 ft².