find the areas of the circular region whose radii are 21cm
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Answered by
7
Answer:
area =22÷7 ×21×21
Step-by-step explanation:
area= 22×3×21
area= 66×21
area=1386
Answered by
1
Answer:Radius of circular region is ,r=21cm
So area of circle =22/7×r^2
=22/7×21×21
=22×3×21
=22×63
=1386cm^2
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