The circumference of the bottom surface of a cylinder is 18.84 meters, and the height is 1.2 meters

The circumference of the bottom surface of a cylinder is 18.84 meters, and the height is 1.2 meters

Cylinder radius = 18.84 △ 2 △ 3.14 = 3M height = 1.2m surface area = 2 × bottom area + side area = 2 × 3.14 × 3 & # 178; + 2 × 3.14 × 3 × 1.2 = 79.128 square meters ~ Yike forever 523 answers for you, I wish you learning progress ~ ~ ~ ~ if you agree with my answer, Please click the [adopt as a satisfactory answer] button in time ~ ~ the mobile phone questioner can comment "satisfied" on the client ~ ~ ~ your adoption is my driving force ~ ~ ~ if there are any new questions, please ask me for help. The answer is not easy, please understand~~

The surface area of a cylinder is 150.72 square meters, the perimeter of its bottom is 188.4 decimeters, and how high is it? 2,
The surface area of a cylinder is 150.72 square meters, the perimeter of its bottom is 188.4 decimeters, and how high is it?
2. A cylindrical wooden stick, with a bottom diameter of 4cm and a height of 10cm, has a surface area of 4cm?
3. The side area of a cylinder is 12.56 square meters, and the bottom radius is 4 decimeters. How many decimeters is its height?
4. The side area of a cylinder is 37.68 square centimeter, and the bottom radius is 0.3 decimeter. How high is it?
5. A cylindrical iron can without a cover has a bottom diameter of 10 cm and a height of 4 cm. How many square centimeters of iron sheet do you need to use to make this can? (use the rounding method to keep the whole 10 square centimeters)

1、2πRH=150.72;2πR=18.84,H=150.72/18.84
2、

The circumference of the bottom surface of the cylinder is 3.14 meters and the height is 1 meter. Find the surface area of the cylinder

Side area: 3.14x1 = 3.14m2
Bottom radius: 3.14 △ 3.14 △ 2 = 1 / 2m
Bottom area: 1 / 2x1 / 2x3.14x2 = 1.57m2
Surface area: 3.14 + 1.57 = 4.71 square meters
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