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Eight little cubes.
112 cm squared
You need three measures of length to determine the surface area - the length, width and height.
base x height = area 2 cm x 2cm = 2cm^2 (squared) :)
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.