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Q.

Find the circumference of a circle whose diameter is 4.2 cm.


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a

11.3 cm

b

11.9 cm

c

12.5 cm

d

13.2 cm 

answer is D.

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Detailed Solution

Given a circle having diameter 4.2 cm.
The circumference of the circle formula is,
C=πd  
Substituting given diameter in circumference formula.
Question ImageTherefore, the circumference is 13.2 cm.
Hence, option 4 is correct.
 
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Find the circumference of a circle whose diameter is 4.2 cm.