The cylinder's surface area can be seen as three separate parts that are top, bottom, and side. The area of the side has the shape of a of width h. The top and the bottom are of radius r.
Since the top and the bottom are , they have the same .
Area ofOne CircleA=πr2Area ofTwo CirclesA=2πr2
To find the , its length must be found first. The length of the rectangle that forms the lateral part of the cylinder is the of the base, which is
2πr.
Therefore, the area of the rectangle is the product of
h and
2πr.
Area of the RectangleA=2πrh
The surface area of the cylinder
S is the sum of the areas of the rectangle and the circles.