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Find the area of a ring whose outer and inner radii are 19 cm and 16 cm respectively.A. $330\\text{ cm}^{2}$ B. $310\\text{ cm}^{2}$ C. $320\\text{ cm}^{2}$ D. $350\\text{ cm}^{2}$
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Find the area of a ring whose outer and inner radii are respectively 23 cm and 12 cm...
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