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If a circle has a radius of 4 cm, what is its circumference? (Use π = 3.14) (202

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Question: If a circle has a radius of 4 cm, what is its circumference? (Use π = 3.14) (2023)

Options:

  1. 12.56 cm
  2. 25.12 cm
  3. 50.24 cm
  4. 6.28 cm

Correct Answer: 12.56 cm

Exam Year: 2023

Solution: 

Circumference = 2πr = 2 * 3.14 * 4 cm = 25.12 cm.

If a circle has a radius of 4 cm, what is its circumference? (Use π = 3.14) (202

Practice Questions

Q1
If a circle has a radius of 4 cm, what is its circumference? (Use π = 3.14) (2023)
  1. 12.56 cm
  2. 25.12 cm
  3. 50.24 cm
  4. 6.28 cm

Questions & Step-by-Step Solutions

If a circle has a radius of 4 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.
  • Step 3: Substitute the radius (r) with 4 cm in the formula.
  • Step 4: Calculate 2 * 3.14 * 4 cm.
  • Step 5: Perform the multiplication: 2 * 3.14 = 6.28.
  • Step 6: Now multiply 6.28 by 4 cm to get 25.12 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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