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If a circle has a radius of 3 cm, what is its circumference? (Use π = 3.14) (202

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Question: If a circle has a radius of 3 cm, what is its circumference? (Use π = 3.14) (2023)

Options:

  1. 6.28 cm
  2. 9.42 cm
  3. 12.56 cm
  4. 15.70 cm

Correct Answer: 12.56 cm

Solution: 

Circumference = 2πr = 2 * 3.14 * 3 = 18.84 cm.

If a circle has a radius of 3 cm, what is its circumference? (Use π = 3.14) (202

Practice Questions

Q1
If a circle has a radius of 3 cm, what is its circumference? (Use π = 3.14) (2023)
  1. 6.28 cm
  2. 9.42 cm
  3. 12.56 cm
  4. 15.70 cm

Questions & Step-by-Step Solutions

If a circle has a radius of 3 cm, what is its circumference? (Use π = 3.14) (2023)
  • Step 1: Identify the formula for the circumference of a circle, which is Circumference = 2πr.
  • Step 2: Substitute the value of π with 3.14 in the formula.
  • Step 3: Substitute the radius (r) with 3 cm in the formula.
  • Step 4: Calculate 2 * 3.14 * 3.
  • Step 5: Perform the multiplication: 2 * 3.14 = 6.28.
  • Step 6: Now multiply 6.28 by 3 to get 18.84 cm.
  • Circumference of a Circle – The circumference of a circle is calculated using the formula C = 2πr, where r is the radius.
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