find the area of the Ring formed by two concreting circles whose inner radius is 7 cm and width of the ring is 7cm
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Given ,
Inner radius of Concentric circle = 7cm
width of ring = 7cm
Outer Radius = (7+7)cm = 14 cm
Area of ring = π(R² - r²)
=> 22/7×(14×14-7×7)
=> 22/7×(196-49)
=> 22/7× 147
=> 22×21
=> 462
Area of ring is 462 cm²
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