Let R and r denotes the radii of outer and inner circles respectively, then area of the circular ring is calculated using the formula:
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Calculate the area of a circular ring whose outer and inner radii are \\[12\\] and \\[10\\ cm\\]. A.\\[118.16\\ cm^{2}\\]B.\\[128.16\\ cm^{2}\\]C.\\[138.16\\ cm^{2}\\]D.\\[148.16\\ cm^{2}\\]
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Find the area of a flat circular ring formed by two concentric circles circles with same centre whose radii are 9 cm and 5 cm.
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Find the area of a flat circular ring formed by two concentric circles (circles with same center) whose radii are 9 cm and 5cm.
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