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What is the diameter of a circle with an area of 78.5 cm²? (2018)

Practice Questions

1 question
Q1
What is the diameter of a circle with an area of 78.5 cm²? (2018)
  1. 10 cm
  2. 8 cm
  3. 6 cm
  4. 12 cm

Questions & Step-by-step Solutions

1 item
Q
Q: What is the diameter of a circle with an area of 78.5 cm²? (2018)
Solution: Area = πr²; 78.5 = πr²; r² = 78.5/π; d = 2√(78.5/π) ≈ 10 cm.
Steps: 0

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