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The figure given below is a right circular cylinder.  The two bases are circles of the same size with centers 0 and P, respectively, and altitude (height) OP is perpendicular to the bases.  The surface area of a right circular cylinder with a base of radius ‘r’ and height ‘h’ is equal to 2(r2) + 2rh (the sum of the areas of the two bases plus the area of the curved surface). The volume of a cylinder is equal to r2h, that is (area of base) x (height).


In the cylinder given below, the surface area is equal to 2(25) + 2(5)(8) = 130, and the volume is equal to 25(8) = 200.


  • Volume = r2h, where ‘r’ = radius of the cylinder.
  • ‘h’ = Height of the cylinder
  • Surface Area (curved) = 2 rh.
  • Surface Area (total) = Curved surface area + the two circles on the top and bottom one each 2rh + 2 r2.

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