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What is the circumference of a circle with a radius of 7 cm? (Use π ≈ 3.14)

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Question: What is the circumference of a circle with a radius of 7 cm? (Use π ≈ 3.14)

Options:

  1. 43.96 cm
  2. 44.00 cm
  3. 42.00 cm
  4. 45.00 cm

Correct Answer: 43.96 cm

Solution: 

Circumference = 2 * π * radius = 2 * 3.14 * 7 = 43.96 cm.

What is the circumference of a circle with a radius of 7 cm? (Use π ≈ 3.14)

Practice Questions

Q1
What is the circumference of a circle with a radius of 7 cm? (Use π ≈ 3.14)
  1. 43.96 cm
  2. 44.00 cm
  3. 42.00 cm
  4. 45.00 cm

Questions & Step-by-Step Solutions

What is the circumference of a circle with a radius of 7 cm? (Use π ≈ 3.14)
  • Step 1: Identify the formula for the circumference of a circle, which is Circumference = 2 * π * radius.
  • Step 2: Substitute the value of π with 3.14 and the radius with 7 cm into the formula.
  • Step 3: Calculate 2 * 3.14, which equals 6.28.
  • Step 4: Multiply 6.28 by the radius (7 cm).
  • Step 5: Calculate 6.28 * 7, which equals 43.96 cm.
  • Circumference of a Circle – The circumference is the distance around a circle, calculated using the formula C = 2 * π * r, where r is the radius.
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