Solution: 1: If the cylinder is divided into two and two bottoms are added, the square of the radius of the bottom is100.48/(2 * 3.14) =16, the diameter of the bottom is 8 cm, and the original surface area of the cylinder is100. 2: The two added surfaces are 7 cm long and 6 cm wide, so the surface area of two cuboids is 6*7*2+2*(5*6+5*7+6*7)=298 square centimeters.