hayliewhite36
hayliewhite36 hayliewhite36
  • 22-02-2022
  • Mathematics
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PLEASE HELP ASAPPPPP

PLEASE HELP ASAPPPPP class=

Respuesta :

radioactiveanwyn radioactiveanwyn
  • 22-02-2022

Answer:

506.7 cm²

Step-by-step explanation:

The amount of cardboard needed would be the surface area of the cone,

S= pi(r)(l+r) where r is the radius and l is the slant height.

You can find l using the Pythagorean theorem. l²=r²+h² which is l²=6²+20² and you get l = √436.

Plug r and l into the equation: S = 6pi(√436 + 6) = 506.7 cm²

Let me know if you have any questions about my steps!

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