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WAEC Mathematics 2007 Question 14

Question 14

Mensuration of Plane Shapes

The area of a square field is 110.25 m2. Find the cost of fencing it round at N75.00 per metre.

  1. A.N1,575.00
  2. B.N3,150.00
  3. C.N4,734.30
  4. D.N8,268.75
Show the answer and explanation

Answer: B (N3,150.00)

Explanation

Side = √110.25 = 10.5 m, perimeter = 4 × 10.5 = 42 m, cost = 42 × 75 = N3,150.00.