JAMB Mathematics 2020 Objective — Question 5
Question 5 of 40 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2020 Objective paper, with the correct answer and a full explanation.
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What is the total surface area of a cylinder of height h and radius r, if it is closed at one end?
- A. pi*r^2
- B. 2*pi*r^2
- C. 2*pi*r*h + pi*r^2Correct
- D. 2*pi*r*h + 2*pi*r^2
Explanation
Curved surface area of a cylinder = 2*pi*r*h. Area of one closed end = pi*r^2. Total surface area closed at one end = 2*pi*r*h + pi*r^2.
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