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Cylinder surface area
Cylinder surface area
Example 1
A cylinder has radius 8cm and height 8cm. Find its curved surface area only. Write the answer as kπcm2 and enter k.
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Answer: 128
- Curved area = circumference × height =2πrh=128π.
- No circular end faces are included. The coefficient is 128.
Example 2
A cylinder has radius 2cm and height 8cm. Find its total surface area with one circular base and an open top. Write the answer as kπcm2 and enter k.
Show worked answer
Answer: 36
- Curved area = circumference × height =2πrh=32π.
- Include one base of area 4π. The coefficient is 36.
Example 3
A cylinder has radius 8cm and height 9cm. Find its total surface area including both circular ends. Write the answer as kπcm2 and enter k.
Show worked answer
Answer: 272
- Curved area = circumference × height =2πrh=144π.
- Include two ends of total area 128π. The coefficient is 272.
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