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Question
The diameter of a cylinder is 28 cm and its height is 20 cm. The total surface area of the cylinder is ______.
Options
2993 cm2
2992 cm2
2292 cm2
2229 cm2
MCQ
Fill in the Blanks
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Solution
The diameter of a cylinder is 28 cm and its height is 20 cm. The total surface area of the cylinder is 2992 cm2.
Explanation:
The total surface area of the cylinder = 2πr + 2r2
= 2π(h + r)
`= [2xx22/7xx14xx(20+14)]"cm"^2` `["d" = 28 cm => "r" = 28/2 "cm" = 14 "cm" ]`
`= 20944/7 "cm"^2`
= 2992 cm2
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