In the given figure, a square O A B C has been inscribed in the quadrant OB Q. If O A=20  cm then...

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In the given figure, a square O A B C has been inscribed in the quadrant OB Q. If O A=20  cm then the area of the shaded region is [take π=3.14]
(a) 214  cm^2
(b) 228  cm^2
(c) 242  cm^2
(d) 248  cm^2

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