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Find the area of the shaded region, if t...

Find the area of the shaded region, if the diameter of the circle with centre O is 28 cm and `AQ=1/4AB` [Use `pi=22/7`]

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`AQ= 7cm` `BQ= AB-AQ= 21cm` Area of shaded region=`pi/2(7/2)^2+ pi/2(21/2)^2= pi/2(49/4+441/4)`
=`22/(7*2)*490/4= 192.5cm^2`
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