WAEC Mathematics 2018 Objective — Question 13
Question 13 of 50 from the West African Examinations Council (WAEC) Mathematics 2018 Objective paper, with the correct answer and a full explanation.
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The volume of a cylindrical tank, 10m high, is 385m³. Find the diameter of the tank. [Take π = 22/7]
- A. 14m
- B. 10m
- C. 7mCorrect
- D. 5m
Explanation
385=πr²(10) → r²=385×7/(22×10)=12.25 → r=3.5m, diameter=7m.
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