afnanetayyim
afnanetayyim afnanetayyim
  • 03-08-2020
  • Mathematics
contestada

PLEASE HELP FAST!! The cone and the cylinder below have equal surface area. True or False??

PLEASE HELP FAST The cone and the cylinder below have equal surface area True or False class=

Respuesta :

akposevictor
akposevictor akposevictor
  • 08-08-2020

Answer:

B. FALSE

Step-by-step explanation:

Surface area of cone = πr(r + l)

Where,

r = r

l = 3r

S.A of cone = πr(r + 3r)

= πr² + 3πr²

S.A of cone = 4πr²

Surface area of cylinder = 2πrh + 2πr² = 2πr(h + r)

Where,

r = r

h = 2r

S.A of cylinder = 2πr(2r + r)

= 4πr² + 2πr²

S.A of cylinder = 6πr²

The surface are of the cone and that of the cylinder are not the same. The answer is false.

Answer Link
switchblade004 switchblade004
  • 23-04-2021

Answer:false

Step-by-step explanation:

False

Answer Link

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