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0580 P22 - Jun 2023 - Q11 - 3 marks
11948
Annular sector with angle 140 degrees, inner radius 3.2 cm, radial thickness 2.6 cm

The two sectors have centre \(O\) and angle \(140^\circ\). \(OC=3.2\text{ cm},CB=2.6\text{ cm}\). The shaded area is \(k\pi\text{ cm}^2\).

Find \(k\). [3]

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