11)   Calculate the area of the shaded portion of the figure alongside.



12) Find the area of the shaded region of the figure alongside.

Dear student
Que 12We have,Shaded area=Area of sector OCD-Area of sector OAB=60360×227×7×7-60360×227×4×4cm2=60360×22749-16=16×227×33=17.28cm2
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