The diameter of the bottom surface of a cylinder is 4 meters and the height is 6 meters. If the cylinder is cut in half along the diameter of the bottom surface, how much will the surface area of the cylinder increase?

4 × 6 × 2 = 48 square meters

The diameter of the bottom surface of a cylinder is 20 decimeters, and the height is 6 decimeters. If the cylinder is cut in half along the diameter of the bottom surface, how much has the surface area of the cylinder increased?

Solution: the surface area is increased by cutting 2 rectangles
2 * 20 * 6 = 240 square decimeters
So add 240 square decimeters

There is a cylinder with a height of 30 cm and a sector with a radius of 10 cm and a center of 270 ° on the bottom

600 picocm

The diameter of the bottom surface of a cylinder is 3cm and the height is 10cm?

3.14 × 1.5 square × 2 + 3.14 × 3 × 10 = 108.33 square centimeter

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