The circumference of the bottom surface is 18.84 decimeters and the height is 7 decimeters

The circumference of the bottom surface is 18.84 decimeters and the height is 7 decimeters

（18.84÷3.14÷2）²×3.14×2+18.84×7=188.4（dm²）

(1) the radius of the bottom surface is 2 decimeters and the height is 7.3 decimeters. (2) the perimeter of the bottom surface is 18.84 meters and the height is 5 meters

(1) 3.14 × 2 × 2 × 7.3 + 3.14 × 22 × 2, = 91.688 + 25.12, = 116.808 (square decimeter), answer: the surface area of the cylinder is 116.808 square decimeter. (2) 18.84 × 5 + 3.14 × (18.84 △ 3.14 △ 2) 2 × 2, = 94.2 + 56.52, = 150.72 (square meter), answer: the surface area of the cylinder is 150.72 square meter

Find the surface area of the cylinder. (1) height 50 cm, bottom radius 10 cm. (2) bottom circumference 62.8 decimeters. (3) bottom diameter 2 meters, height
1.5m

1 3.14x2x10x50 plus the square of 3.14x10 2 62.8x12 plus the square of 3.14x (62.8 divided by 2 divided by 3.14)
3 3.14x2x1.5 plus the square x2 of 3.14x (2 divided by 2) should be sensible