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If the diameter of a circle is 20 cm, what is the circumference? (2019)

Practice Questions

Q1
If the diameter of a circle is 20 cm, what is the circumference? (2019)
  1. 20π cm
  2. 40π cm
  3. 10π cm
  4. 30π cm

Questions & Step-by-Step Solutions

If the diameter of a circle is 20 cm, what is the circumference? (2019)
  • Step 1: Understand that the diameter of the circle is given as 20 cm.
  • Step 2: Recall the formula for the circumference of a circle, which is Circumference = π × diameter.
  • Step 3: Substitute the diameter value into the formula: Circumference = π × 20 cm.
  • Step 4: Simplify the expression: Circumference = 20π cm.
  • Circumference of a Circle – The circumference of a circle can be calculated using the formula C = πd, where d is the diameter.
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