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Area of Sector = n/360*3.14*r2

where n= central angle and r= radius of circle

Angle made by larger sector with center D AND B is 120and by A and C is 600

Area of shaded portion is 2/3*3.14*42+1/3*3.14*42= 100.48cm2

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Here the radius of each circle r = 10cm
Total angle subtended by 4 sectors (shaded) is
= (2×120 +2×60)=360 degree.
Hence area of total shaded parts will be
=πr^2=π×10^2=100π cm^2

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