The circumference of two concentric circles are 121cm and 154cm. calculate the difference between their radii
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Step-by-step explanation:
the first radii is 24.5 and the second radii is 20.8
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Answer:
For bigger circle 2πr =154cm
R¹ =154÷2π
For smaller circle 2πr²= 121cm
R² =121÷2π
therefore , R¹-R²
=154/2π- 121/2π
=33/2π
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