WAEC Mathematics 2022 Objective — Question 42
Question 42 of 50 from the West African Examinations Council (WAEC) Mathematics 2022 Objective paper, with the correct answer and a full explanation.
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Find the volume of a cone of radius 3.5cm and vertical height 12cm. [Take π=22/7].
- A. 15.5 cm³
- B. 21.0 cm³
- C. 142.0 cm³
- D. 154.0 cm³Correct
Explanation
Volume of cone = (1/3)πr²h = (1/3)×(22/7)×3.5²×12 = 154.0 cm³.
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