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first you have to ask yourself two questions:

1) what is the area of a circle?

2) what is the circumference of a circle?

Area(circle) = pi*r^2

circumference(circle) = 2*pi*r

secondly you realize that the surface area of a cylinder is the summation of the surface area of the top, bottom, and side.

first let's focus on the area of the top and bottom, these are both circles with the same radius and therefore the same area.

so the top and bottom have a combined area of 2*pi*r^2.

next we focus on the area of the side. to do this you must realize that the side of a cylinder is basically a rectangle that has been bent.

the length of this rectangle is given by the circumference of the circle

making the area simply

Area(rectangle) = length*height = 2*pi*r*h

all together this gives a surface area of

Area(cylinder) = 2*pi*r^2 + 2*pi*r*h = 2*pi*(r^2+h)

given that the radius r = 1

Area = 2*pi*(h+1)

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Q: What is the surface area of a cylinder with one radius?
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