sloanedaisy
sloanedaisy sloanedaisy
  • 03-03-2020
  • Mathematics
contestada

What is the surface area of the right cone below?
O A. 126x units
O B. 54 units
OC. 63x units
D. 998 units
O

What is the surface area of the right cone below O A 126x units O B 54 units OC 63x units D 998 units O class=

Respuesta :

calculista
calculista calculista
  • 11-03-2020

Answer:

[tex]SA=54\pi\ units^2[/tex]

Step-by-step explanation:

we know that

The surface area of the cone is given by the formula

[tex]SA=\pi r^{2}+\pi rl[/tex]

where

r is the radius of the base

l is the slant height

we have

[tex]r=3\ units\\l=15\ units[/tex]

substitute

[tex]SA=\pi (3)^{2}+\pi (3)(15)[/tex]

[tex]SA=54\pi\ units^2[/tex]

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