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What is the circumference of a circle with a radius of 5 units?

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Question: What is the circumference of a circle with a radius of 5 units?

Options:

  1. 10π
  2. 15π
  3. 20π
  4. 25π

Correct Answer: 10π

Solution: 

The circumference of a circle is given by the formula: C = 2πr. Here, r = 5, so C = 2π * 5 = 10π.

What is the circumference of a circle with a radius of 5 units?

Practice Questions

Q1
What is the circumference of a circle with a radius of 5 units?
  1. 10π
  2. 15π
  3. 20π
  4. 25π

Questions & Step-by-Step Solutions

What is the circumference of a circle with a radius of 5 units?
  • Step 1: Understand that the circumference of a circle is the distance around it.
  • Step 2: Know the formula for circumference, which is C = 2πr.
  • Step 3: Identify the radius (r) of the circle. In this case, r = 5 units.
  • Step 4: Substitute the radius into the formula: C = 2π * 5.
  • Step 5: Calculate the multiplication: 2 * 5 = 10.
  • Step 6: Write the final answer as C = 10π.
  • Circumference of a Circle – The circumference is the distance around a circle, calculated using the formula C = 2πr, where r is the radius.
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