Imagine the cylinder is a stack of thin plates with radius 3. The surface area of the cylinder will be the total of the circumferences (the distance around the outside) of all the plates.
First, you need to figure out the circumference of a plate. Circumference equals pi (3.1415926...) times the diameter. (You can probably round pi to four digits for this problem.) The formulas in this specific case are:
Circumference = pi multiplied by the diameter (3+3)
Surface area = Circumference multiplied by the height of the cylinder (8)
The problem doesn't indicate if the cylinder is hollow, so you may need to add the areas of the top and bottom to get the total surface area. The formula for the area of a circle is pitimes the radius squared (3x3).
The surface are of a cylinder whose radius is 10cm and height is 20cm is 1884.96cm2
A cylinder whose radius is 5 and height is 7 has a surface area of 377 units2
This cylinder's height is 6 (5.98) units.
A cylinder whose radius is 2cm and height is 8cm has a total surface area of approximately 125.66cm2 {ADDED} To explain that further, the formula is pi*r^2 X h where r is the radius and h the height.
The surface area of a cylinder is 2*pi*radius*height. In this case it would be 2*pi*5*10 = 314.16
The surface are of a cylinder whose radius is 10cm and height is 20cm is 1884.96cm2
A cylinder whose radius is 6 and height is 14 has a surface area of 754 units2
A cylinder whose radius is 5 and height is 7 has a surface area of 377 units2
The curved surface area of a cylinder whose height is 14 feet and radius is 6 feet is 527.79ft2
This cylinder's height is 6 (5.98) units.
847.8
37.68
A cylinder whose radius is 2cm and height is 8cm has a total surface area of approximately 125.66cm2 {ADDED} To explain that further, the formula is pi*r^2 X h where r is the radius and h the height.
The surface area of a cylinder is 2*pi*radius*height. In this case it would be 2*pi*5*10 = 314.16
Surface area = 673.87 units2
345.6 units2
1,979.2 units2