Find the area of a flat circular ring formed by two concentric circles whose radii is equals to 9 cm and 5 cm
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Given outer radii is 9cm then area is
pie r2 then area = 22÷7×9×9-22÷7×5×5
then the result is =176
i think
it may helps you
pie r2 then area = 22÷7×9×9-22÷7×5×5
then the result is =176
i think
it may helps you
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