Find the area of ring shaped region enclosed between two concentric circle of radii 20cm and 15cm
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R=10
r=7.5
area of ring region=π(R-r)^2
=22/7(10-7.5)
=22×6.25/7
=137.5/7
=19.64 cm
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Answer:
ur wrong ❌once again check it.. there is no option in my book
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