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PetricevicE01
PetricevicE01 PetricevicE01
  • 23-03-2015
  • Mathematics
Answered

The diameter of this compact disc is 11.8cm. The hole in the middle has a area of 1.54cm2. What is the area of the plastic in this disc?

Verified Answer :

Since3122015
Since3122015 Since3122015
  • 23-03-2015

\(A=A_{disc}-A_{hole}\\A=\pi r^2-(1.54)\\A=\pi(5.9)^2-1.54\\A=34.81\pi -1.54\\A=109.358840271-1.54\\A=107.818840271\)

Area = 107.82 square inches.

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