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Q.

Find the perimeter of a circle whose radius is 7 cm (in cm).

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a

12π

b

14π

c

16π

d

10π  

answer is B.

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Detailed Solution

Given, radius of the circle is 7 cm.
We know that,
Perimeter of a circle =2πr,where r is the radius of the circle.
So, perimeter of the given circle is
⇒2×π×7
⇒14π Hence, perimeter of circle= 14π.
Hence, option 2 is correct.
 
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