laurene34 laurene34
  • 06-11-2018
  • Mathematics
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Find the surface area of the cone.

Find the surface area of the cone class=

Respuesta :

gmany
gmany gmany
  • 06-11-2018

The formula of a surface area of a cone:

[tex]S.A.=\pi r^2+\pi rl[/tex]

r - radius

l - slant height

We have r = 7cm and l = 10cm. Substitute:

[tex]S.A.=\pi(7^2)+\pi(7)(10)=49\pi+70\pi=119\pi[/tex]

Answer: 119π cm²

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