find the area of shaded region in the above figure, if radii of the two concentric circles with centre O are 7cm and 14 cm respectively and angle AOC=40°
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the answer is 154/3 cm^2
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60° the substance that was shaded region is mainly the total region of the both circles is 100° radius in that he give 40° then 60° will be remained so the answer is 60°
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