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What is the radius of a circle if the circumference is 31.4 cm?

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Question: What is the radius of a circle if the circumference is 31.4 cm?

Options:

  1. 5 cm
  2. 10 cm
  3. 15 cm
  4. 20 cm

Correct Answer: 10 cm

Solution: 

The circumference C = 2πr. Thus, r = C/(2π) = 31.4/(2π) ≈ 5 cm.

What is the radius of a circle if the circumference is 31.4 cm?

Practice Questions

Q1
What is the radius of a circle if the circumference is 31.4 cm?
  1. 5 cm
  2. 10 cm
  3. 15 cm
  4. 20 cm

Questions & Step-by-Step Solutions

What is the radius of a circle if the circumference is 31.4 cm?
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