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18 September, 11:39

Determine the surface area of this

cone if the radius is 4 cm and the

height is 12 cm. Round your answer

to the nearest tenth.

+5
Answers (2)
  1. 18 September, 14:13
    0
    209.22cm²

    Step-by-step explanation:

    A=πrl+πr2

    l=r2+h2

    Solving forA

    A=πr (r+h2+r2) = π·4· (4+122+42) ≈209.21889cm²
  2. 18 September, 14:34
    0
    209.22 because A = pi * r * l + pi r^2
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