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29 December, 16:23

One circle has a circumference of 123 cm. Another circle has a circumference of 32 cm. What is the ratio of the radius of the

smaller circle to the radius of the larger circle?

3:8

8:3

1:3

3:1

+5
Answers (2)
  1. 29 December, 16:34
    0
    Answer: 1:3

    Step-by-step explanation:

    Cir. of the bigger circle = 123 cm

    r = C / 2π

    r = 123 / 2π = 19.58

    Cir of smaller circle = 32 cm

    r = 32 / 2π = 5.09

    Ratio = 5.09 : 19.58

    = 1:3
  2. 29 December, 16:43
    0
    1:3

    Step-by-step explanation:

    First find the measure of radius for both circles:

    Circle 1:

    2 x pi x r = 123

    r = 123 divided by 6.28 = 19.58

    Circle 2:

    2 x pi x r = 32

    r = 32 divided by 6.28 = 5.09

    So, Ratio:

    5.09 : 19.58

    Approximately 1:3 (6:18)
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