The volume of a certain kind of drink is 3 liters, and its bottle body is cylindrical (excluding the bottleneck). Now there are some drinks in the bottle. The height of the drink is 20cm when it is placed upright and 20cm when it is placed upside down The height of the spare part is 5cm

The volume of a certain kind of drink is 3 liters, and its bottle body is cylindrical (excluding the bottleneck). Now there are some drinks in the bottle. The height of the drink is 20cm when it is placed upright and 20cm when it is placed upside down The height of the spare part is 5cm

Let v be the volume of the existing beverage, the area of the bottom of the cylinder is s, and the height is 20 when placed upright, so v = 20 * s
The height of the remaining part is 5, and the total volume is 3l, that is 3000cm ^ 3, so 5S + 20 * s = 3000
The solution is s = 120, so v = 20s = 2400cm ^ 3 = 2.4L

There is a kind of beverage bottle with a volume of 50 cubic centimeters and a cylindrical body (excluding the bottle neck). Now there are some drinks in the bottle. The height of the drink is 20 cm when it is placed upright, and the height of the rest part when it is placed upside down is 5 cm______ Cubic centimeter

50 × [20 ÷ (20 + 5)] = 50 × 45 = 40 (CC), so the answer is: 40 CC

There is a kind of beverage bottle with cylindrical body (excluding bottle neck) and a volume of 2.4 cubic decimeters. There are some drinks in the bottle
The height of the beverage part is 12 cm when it is placed upright and 3 cm when it is placed upside down (as shown in the figure). How many liters of beverage are available in the bottle?

12 + 3 = 15cm = 1.5 decimeter
2.4 / 1.5 = 1.6 square decimeter,
1.6 * 1.2 = 1.92 cubic decimeter = 1.92 liter
The available beverage is 1.92 liters

There is a kind of beverage bottle with a volume of 30 cubic decimeters, and its body is a cylinder (excluding the bottle neck). First, put some drinks into the bottle, as shown in the figure, the height of the drink is 20 cm when it is being placed, and the height of the rest of the time is 5 cm when it is upside down. How many cubic decimeters of drinks are there in the bottle? (if you can't see the picture clearly, please click the picture and maximize the picture window)

Set the existing beverage in the bottle x cubic decimeter
（x/20）*5+x=30
The solution is x = 24
X / 20 can find out the bottom area of the bottle, and * 5 can find out the volume of the spare part, plus x is the spare part plus the drink part, and is the volume of the bottle, that is 30