Find the area of a circular ring with outer radius 20cm and inner radius 15 cm?
Answers
Answered by
1
Answer:
549.5cm²
Step-by-step explanation:
- Area of ring = Area of outer circle - Area of inner circle
- Radius of outer circle = 20cm
Radius of inner circle = 15cm
- Area of outer circle = πr² = 3.14×20² = 1256cm²
- Area of inner circle = πr² = 3.14×15² = 706.5cm²
Hence
- Area of ring = 1256 - 706.5
- = 549.5cm²
Answered by
0
Answer:
first we multiply 15 by 3.14 then we found it square which is equal to =
Hence
Area of ring = 1256 - 706.5
= 549.5 cm square
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Step-by-step explanation:
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