The side area of a cylinder is 188.4 square decimeters, and the height is 15 decimeters. What is the surface area of the cylinder

The side area of a cylinder is 188.4 square decimeters, and the height is 15 decimeters. What is the surface area of the cylinder

Then the perimeter of the bottom surface is 188.4/15 = 12.56 decimeters, the diameter is 12.56/3.14 = 4 decimeters, the radius is 2 decimeters, the bottom area is 3.14 * 4 = 12.56 square decimeters, the two bottom areas are 25.12 square decimeters, and the surface area is 188.4 + 25.12 = 213.52 square decimeters