Question

Find the surface area of a cone with a diameter of 16 inches and a slant height of 9 inches. Use 3.14 for pi.(1 point)
Responses

1,256 square inches
1,256 square inches

226.08 square inches
226.08 square inches

427.04 square inches
427.04 square inches

480.42 square inches

Answer 1

Surface area = πr(r + l) with r = 8 in and l = 9 in:
Surface area = π·8·(8 + 9) = π·8·17 = 136π ≈ 136·3.14 = 427.04 square inches.

Answer: 427.04 square inches.