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In a school, an SUPW exam is conducted i...

In a school, an SUPW exam is conducted in class X. Rubina wins 1st prize. She made a square embroider handkerchief with 9 circular thread designs on it.

On a square handkerchief, nine circular designs each of radius 7 cm are made (see in figure). Find the circumference of one of the circular design.

A

41 cm

B

42 cm

C

43 cm

D

44 cm

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