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WAEC Mathematics 2002 Question 27

Question 27

Mensuration of Solids

The base diameter of a cone is 14cm, and its volume is 462 cm3. Find its height. [Take π = 22/7]

  1. A.3.5cm
  2. B.5cm
  3. C.7cm
  4. D.9cm
Show the answer and explanation

Answer: D (9cm)

Explanation

r = 7 cm. 462 = ⅓ × 22/7 × 49 × h = 154h/3, so h = 9 cm.