If the ratio of the area of two circles is 49 : 81, then the ratio of – McqOptions

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1.	If the ratio of the area of two circles is 49 : 81, then the ratio of their circumference is:
A.	49 ∶ 81
B.	3 ∶ 4
C.	7 ∶ 9
D.	9 ∶ 7
Answer» D. 9 ∶ 7

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