in the given figure a circle of diameter 21 cm is given inside the circle to circle with diameter 2 by 3 and 1 by 3 of the diameter of the big circle have been drawn as shown in the figure find the area of the shaded region
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Required area=
[(22/7*21/2*21/2)-{(22/7*7*7)+(22/7*7/2*7/2)}]
=154cm
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