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If a circle has a radius of 7 cm, what is its circumference? (Use π = 22/7)

Practice Questions

Q1
If a circle has a radius of 7 cm, what is its circumference? (Use π = 22/7)
  1. 44 cm
  2. 22 cm
  3. 14 cm
  4. 28 cm

Questions & Step-by-Step Solutions

If a circle has a radius of 7 cm, what is its circumference? (Use π = 22/7)
  • Step 1: Understand the formula for circumference of a circle, which is Circumference = 2πr.
  • Step 2: Identify the radius (r) of the circle. In this case, the radius is 7 cm.
  • Step 3: Substitute the value of π (which is 22/7) and the radius (7 cm) into the formula: Circumference = 2 × (22/7) × 7.
  • Step 4: Calculate 2 × (22/7) = 44/7.
  • Step 5: Now multiply (44/7) by 7. The 7s cancel out, leaving you with 44.
  • Step 6: Therefore, the circumference of the circle is 44 cm.
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