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JAMB Mathematics 1979 Question 38

Question 38

Mensuration of Plane Shapes

An arc of a circle of radius 2cm subtends an angle of 60° at the centre. Find the area of the sector

  1. A.2π/3cm2
  2. B.π/6cm2
  3. C.π/3cm2
  4. D.πcm2.
  5. E.4π/3 cm2.
Show the answer and explanation

Answer: A (2π/3cm2)

Explanation

Area = (60/360) × π × 2² = 4π/6 = 2π/3 cm².