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WAEC Mathematics 2012 Question 15

Question 15

Mensuration of Solids

The curved surface area of a cylindrical tin is 704 cm2. If the radius of its base is 8 cm, find the height. [Take π = 22/7]

  1. A.14 cm
  2. B.9cm
  3. C.8 cm
  4. D.7cm
Show the answer and explanation

Answer: A (14 cm)

Explanation

2πrh = 704: h = 704 ÷ (2 × 22/7 × 8) = 704 ÷ 50.29 = 14 cm.