Bottom area =3. 14× circle radius?

The volume of the barrel is 3. 14×25? × 74 = 145L

General formula:? (s is the bottom area and h is the height)

Cylinder:? (R represents the radius of the bottom circle and H represents the height of the cylinder)

Prism:? (bottom area x height)

Cuboid:? (A, B and C respectively represent the length, width and height of a cuboid)

Cube: If A represents the side length of the cube, the volume formula of the cube is? .

Extended data:

1 cubic feet = 1 (feet? ) =0.0283 cubic meters (m? ) =28.3 17 liters (liters) =28.3 17 cubic decimeter (dm? )= 283 17ml = 283 17 cm3(cm？ )=? cubic millimeter

1 cubic inch (in) = 16+0 cubic centimeter (cm? )

Volume and volume are different.

1 has different meanings. For example, the volume of an iron drum refers to the size of the space occupied outside, and the volume of this iron drum refers to the number of objects contained inside. An object has a volume, but it doesn't necessarily have a volume.

2. The measurement methods are different. Generally speaking, before calculating the volume of an object, its length, width and height should be measured. The volume of an object is measured from the outside, but the volume is measured from the inside. A closed object with both volume and volume must be larger than its volume.

3. The company names are not exactly the same. Unit of volume generally uses: cubic meters, cubic decimeters and cubic centimeters; Solid unit of volume is the same as unit of volume, while liquid and gas in unit of volume and unit of volume are generally liters and milliliters.

4. Formula: v cuboid =abc (length× width× height) v cube = a 3 (side length× side length× side length) v cylinder =Sh v cone = 1/3sh.

In order to measure the volume of liquids, such as water and oil, liters and milliliters are usually used, which can also be written as L and mL.

6. To calculate the volume of irregular three-dimensional graphics, you can put this object in water, and use the current volume-the volume of the object that is not put in is the volume or the height-length * width of the object that is not put in (1 liter = 1 cubic decimeter; 1 ml = 1 cm3)

7. The capacity of hard disk is in MB (megabytes) and GB (gigabytes). The size of a single file on a computer is the volume! (For example, a 500kb picture is a 500kb picture)

References:

Baidu Encyclopedia-Volume