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kiss69fist23 Group Title

An outside circular ring has a circumference of 100 cm. What is the circumference of an inner ring which is 5 cm shorter in radius? Both circles have the same center. one circle inside another sharing the same center 20.0 cm 31.8 cm 56.8 cm 68.6 cm An outside circular ring has a circumference of 100 cm. What is the circumference of an inner ring which is 5 cm shorter in radius? Both circles have the same center. one circle inside another sharing the same center 20.0 cm 31.8 cm 56.8 cm 68.6 cm @Mathematics

  • 2 years ago
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  1. hoblos Group Title
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    is there any formula for circumference?

    • 2 years ago
  2. kiss69fist23 Group Title
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    if there is i dont kno it haha :/ sad...but true

    • 2 years ago
  3. hoblos Group Title
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    lol

    • 2 years ago
  4. abdul_shabeer Group Title
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    68.6 cm

    • 2 years ago
  5. kiss69fist23 Group Title
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    i can always count on dear shabeer to save tha day haha

    • 2 years ago
  6. hoblos Group Title
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    abdul shabeer is there any formula??

    • 2 years ago
  7. abdul_shabeer Group Title
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    Are the options rounded off ? I got the answer as 68.57142 still more

    • 2 years ago
  8. abdul_shabeer Group Title
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    Circumference of circle = \[2*\Pi*r\]

    • 2 years ago
  9. sathiprakash Group Title
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    68.6cm.....

    • 2 years ago
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