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UPCAT Mathematics practice question 9: A circle has a circumference of 12π. What is its area?

Correct answer

A. 36π

From C = 2πr, 12π = 2πr gives r = 6. Then A = πr² = 36π.

A circle has a circumference of 12π. What is its area?

  1. 36πCorrect
  2. 6π
  3. 12π
  4. 144π

Why A is correct

From C = 2πr, 12π = 2πr gives r = 6. Then A = πr² = 36π.

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