One circle has a circumference of 12 pie cm. Another circle has a circumference of 32pie cm. What is the ratio of the radius of the smaller circle to the radius of the larger circle?

Question

Mathematics

Dale Graves

5 October, 16:08

One circle has a circumference of 12 pie cm. Another circle has a circumference of 32pie cm. What is the ratio of the radius of the smaller circle to the radius of the larger circle?

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Answers (2)

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Trace Peck · Answer 1

Trace Peck 5 October, 16:14

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The ratio is 8:3

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Karina Gutierrez · Answer 2

Circumference of a circle = pi * diameter, or 2 (pi) * radius.

The first circle with circumference of 12pi means that the diameter is equal to 12. Since radius is just half of diameter 12/2=6. Same goes for the second circle. Half of 32 is 16. The ratio is then equal to 6:16 or 3:8