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A rectangular sheet of iron is 20 cm long and 6.28 cm wide. Taking it as the side of a cylinder, what is the maximum volume of the cylinder?
78.5 cm3
Because it's 20 cm long
So the diameter is 10 cm and the radius is 5 cm
Because the volume of the cylinder is equal to the area of the bottom
Bottom area = 3.14 Χ square of radius
So cylinder volume = 3.14 × 5 × 5 × 6.28 = 78.5 cubic centimeter
A cylinder is 2 meters long and the circumference of its bottom is 6.28 cm. The volume of this cylinder is______ Cubic centimeter
The volume of this cylinder is 628 cubic centimeters. So the answer is: 628
The circumference of the bottom surface of a cylinder is 37.68 cm. The height of the cylinder is equal to twice the radius of the bottom surface. What is the volume of the cylinder in cubic cm
What is the radius of the bottom
37.68 ﹣ 3.14 ﹣ 2 = 6cm
Gao Shi
6 × 2 = 12 cm
The volume is
6 × 6 × 3.14 × 12 = 1356.48 cm3
The height of a cylinder is equal to the circumference of its bottom. If the height is shortened by 2 cm, the surface area will be reduced by 12 square cm. The side area of the cylinder is () square cm
Height of cylinder = circumference of bottom surface = 12 △ 2 = 6 (CM)
Side area = height of cylinder × perimeter of bottom surface = 6 × 6 = 36 (CM & # 178;)
The height of a cylinder is equal to the circumference of the bottom surface. If the height is shortened by 2 cm, the surface area will be reduced by 12 square cm, and the side area of the cylinder is (36) square cm
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