SOLUTION: The circumferences of two circles are in the ratio of 2:5. The radius of the smaller circle is 16 in. What is the radius of the larger circle?

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Question 840244: The circumferences of two circles are in the ratio of 2:5. The radius of the smaller circle is 16 in. What is the radius of the larger circle?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Circumference of a circle is C=2%2Api%2AR.
C%5B2%5D%2FC%5B1%5D=R%5B2%5D%2FR%5B1%5D=2%2F5
5R%5B2%5D=2R%5B1%5D
R%5B1%5D=%285%2F2%29R%5B2%5D
R%5B1%5D=%285%2F2%29%2816%29
R%5B1%5D=40