Find the curved surface area of a cylinder of radius 7 cm and height 12 cm (take π = 22/7).
Answer and explanation
Correct answer: B. 528 cm²
- Step 1: Curved surface area of a cylinder = 2πrh. Step 2. Substitute: 2 (22/7) 7 12 = 2 22 12 = 44 12 = 528 cm². Answer: 528 cm². Why not the others: 264 cm² omits the factor of 2; 616 cm² adds base circles; 836 cm² is the total surface area: 528 + 2(154) = 836 cm².
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