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OAU Post-UTME Mathematics 2013 Question 2

Question 2

Coordinate Geometry

What is the circumference of the circle? x2 + y2 = (7/π)2?

  1. A.16 units
  2. B.14 units
  3. C.15 units
  4. D.15 units
Show the answer and explanation

Answer: B (14 units)

Explanation

The radius is 7/π, so the circumference is 2π × 7/π = 14 units.