WAEC Mathematics 2018 Objective — Question 32
Question 32 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 total surface area of a hemisphere is 75πcm². Find the radius.
- A. 5.0cmCorrect
- B. 7.0cm
- C. 8.5cm
- D. 12.0cm
Explanation
3πr²=75π → r²=25 → r=5.0cm.
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