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If a circular road of radius 9m is reduced to 7m in radius, then what would be the percentage decrease in its area?

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If a circular road of radius 9m is reduced to 7m in radius, then what would be the percentage decrease in its area?
posted Dec 8, 2016 by anonymous

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1 Answer

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39.50617 % 100*(9*9-7*7)/(9*9)

answer Dec 8, 2016 by Kewal Panesar



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