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Sahay Sir > Question Answers > NCERT Class 10 > Maths > Chapter 12 - Areas Related to Circles > AB and CD are respectively arcs of two concentric circles of radii 21cm and 7cm with centre O . If ⌊AOB=30 degree. Find the area of the shaded region.

AB and CD are respectively arcs of two concentric circles of radii 21cm and 7cm with centre O . If ⌊AOB=30 degree. Find the area of the shaded region.

AB and CD are respectively arcs of two concentric circles of radii 21cm and 7cm with centre O . If ⌊AOB=30 degree. Find the area of the shaded region.