If the total mass of a bottle filled with water is 2.5 kg and the total mass of a bottle filled with alcohol is 2.1 kg, the volume of the bottle is --- cubic decimeter

If the total mass of a bottle filled with water is 2.5 kg and the total mass of a bottle filled with alcohol is 2.1 kg, the volume of the bottle is --- cubic decimeter

"Rabbit spicy"
Let the density of water be 1 kg / DM & sup3; and the density of alcohol be 0.8 kg / DM & sup3;
（2.5-2.1）kg÷（1-0.8）kg/dm³＝0.4kg÷0.2kg/dm³＝2dm³
A: the volume of the bottle is 2 cubic centimeters
Checking calculation: the mass of bottle = 2.5kg-1kg / DM & sup3; × 2DM & sup3; = 0.5kg
The mass of alcohol is 0.8kg/dm & sup3; × 2DM & sup3; = 1.6kg
The total mass of the bottle filled with alcohol = (1.6 + 0.5) kg = 2.1kg
The calculation is correct. Good luck. Good bye

A bucket full of ice, the total mass is 20 kg, with ice into water, add 2 cubic decimeter tax to the bucket, just full, find the volume of the bucket and the mass of the bucket H

Two square decimeters of water is 2kg
A full barrel of water is 22kg (mass)
22 * 1kg / DM square = 22 square decimeter (volume)

The volume of a cylindrical bucket is 20 cubic decimeters, which is full of water. The known bottom area is 6 square decimeters, and how high is the water surface?

20 △ 6 = 10 / 3 decimeter