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UI Post-UTME Mathematics 2023 (Model questions) Question 23

Question 23

Mensuration of Plane Shapes

A circle has a radius of 5cm. What is the length of an arc subtending an angle of 60°?

  1. A.31.42cm
  2. B.4.56cm
  3. C.7.41cm
  4. D.5.24cm
Show the answer and explanation

Answer: D (5.24cm)

Explanation

Arc length = (60/360) × 2π × 5 = 5π/3 ≈ 5.24 cm.