Question

Find the surface area of a cone with a slant height of 12 and a radius of 14. Use 3.14 for pi. Round your answer to the nearest tenth.

1142

1143

1144

1145

please explain!

Answer 1

Surface area of cone = πr(l + r)
= 3.14×14(14+12)
= 3.14 × 14 × 26
= 1142.96
= 1143

Answer 2

S = πrl + π r²
r = 14
l = 12
S =1142,96≈1143