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Q.

Find the circumference of a circle whose radius is 10 m  .


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a

320 7 m  

b

440 7 m  

c

420 7 m  

d

470 7 m   

answer is B.

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Detailed Solution

Given a circle having radius 10 m.
Circumference of the circle is,
C=2×π×r C=2×π×10  
C=2× 22 7 ×10  
C= 440 7 m  
Therefore, circumference of the circle is 440 7 m  .
Hence, option 2 is correct.
 
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