WAEC Mathematics 2022 Objective — Question 24
Question 24 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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A cylinder, opened at one end, has a radius of 3.5cm and height 8cm. Calculate the total surface area. [Take π=22/7].
- A. 126.5 cm²
- B. 165.0 cm²
- C. 212.0 cm²
- D. 214.5 cm²Correct
Explanation
T.S.A (one end closed) = 2πrh + πr² = 2×(22/7)×3.5×8 + (22/7)×3.5² = 176 + 38.5 = 214.5 cm².
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