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Q.

Find the area of a circle whose radius is 7 cm.


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a

124c m 2  

b

134c m 2  

c

144c m 2  

d

154c m 2   

answer is D.

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Detailed Solution

Given a circle having radius 7 cm.
The area of a circle formula is,
A=π r 2  
⇒A= 22 7 ×7×7   ⇒A=22×7   ⇒A=154  
Therefore, the area is 154c m 2  .
Hence, option 4 is correct.
 
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