As I read the question, it seems that it is asking for the 3 possible areas a cylinder has: the one for the base; the one for the top (which is the same as the base); and the one from the side as if it were cut longitudinally and opened as a rectangle. The area of the base (and top) is (D/2)^2 x Pi. The area of the side is the circumference of the base x the High = (D x Pi) x H. If indeed you need the sum of all of this, then just add them together.
You can find the area of all the surfaces of a cylinder given the measures of its height and the diameter of one of its bases, by adding up the area of the curved surface and the area of the top and bottom surfaces. The area is the sum of 2pi. R^2 and 2pi.D.h.