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Q.  There are two circles of different radii. The area of a square is 196 sq.cm, whose side is half the radius of the larger circle. The radius of the smaller circle is three-seventh that of the larger circle. What is the circumference of the smaller circle ?

a. 12 π cm
b. 16 π cm
c. 24 π cm
d. 32 π cm


ANSWER: See Answer
 
Radius of larger circle

= 2×196−−−√=28cm

Circumference of smaller circle

= (37×28)cm=12cm

Circumference of smaller circle

= 2πr=2π×12= 24πcm
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