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A circle has a radius of 7 cm. What is its circumference? (2023)

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Question: A circle has a radius of 7 cm. What is its circumference? (2023)

Options:

  1. 44 cm
  2. 40 cm
  3. 38 cm
  4. 42 cm

Correct Answer: 44 cm

Exam Year: 2023

Solution: 

Circumference of a circle = 2πr = 2 × 3.14 × 7 cm ≈ 44 cm.

A circle has a radius of 7 cm. What is its circumference? (2023)

Practice Questions

Q1
A circle has a radius of 7 cm. What is its circumference? (2023)
  1. 44 cm
  2. 40 cm
  3. 38 cm
  4. 42 cm

Questions & Step-by-Step Solutions

A circle has a radius of 7 cm. What is its circumference? (2023)
  • Step 1: Identify the formula for the circumference of a circle, which is Circumference = 2πr.
  • Step 2: Substitute the radius (r) into the formula. Here, the radius is 7 cm.
  • Step 3: Calculate 2 times π (approximately 3.14) times the radius (7 cm).
  • Step 4: Perform the multiplication: 2 × 3.14 × 7.
  • Step 5: Calculate the result, which is approximately 44 cm.
  • 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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