Engineering Board Exam Reviewer · Areas of Plane Figures · medium
Find the area of the ring between two concentric circles of radii 12 and 7.
- 5 π 15.71
- 25 π 78.54
- 95 π 298.45
- 193 π 606.33
Answer
C. 95 π 298.45
Solution
A=π(122-72)=95π 298.45.
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