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Q.

Find the circumference of a circle whose radius is 4 m.


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a

176 7 m  

b

126 7 m  

c

156 7 m  

d

165 7 m   

answer is A.

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Detailed Solution

Given a circle having radius 4 m.
Circumference of the circle is,
C=2×π×r ⇒C=2×π×4  
⇒C=2× 22 7 ×4  
⇒C= 176 7 m  
Therefore, circumference of the circle is 176 7 m  .
Hence, option 1 is correct.
 
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Find the circumference of a circle whose radius is 4 m.