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dekho dono semicircles ka radius 10.5 hoga to dono ka perimeter 2*22/7*10.5 kr lo isse tmhara semicircle ka perimeter aa jayega. uske baad rectangle ka 2* (l+b) se nikal lo perimeter l=21 and b= 36-10.5 +10.5 that is equal to 15 so perimeter of rectangle bhi aa jayega .
aur area ke liye un dona semicircle ka radius h 10.5 to usse unka area nikal jaatega aur rectangle ka lenght breadth to bta hi diya h
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