4: (2 and two thirds (8/3))= 18: 12
5: (25/3 (8 and 1)) = 3: 5.
2. The school bought *** 168 basketball and football, and the ratio of basketball to football was 5: 3. How many basketball and football did you buy?
Solution: There are 168 ÷ (5+3) × 5 = 105 basketballs bought.
Then the football you buy is 168 ÷ (5+3) × 3 = 63 (pieces).
There are/kloc-0.05 basketballs and 63 footballs.
Generally, the mass of water with the same volume is 25% greater than that of alcohol. There is a bucket of water with a mass of 25 kilograms. If the volume of a barrel of alcohol is the same as that of this barrel of water, what is the mass of this barrel of alcohol?
Solution: Suppose the mass of alcohol is 1, then the mass of water is (1+25%) according to the meaning of the question.
Given that the mass of water is 25 kg, the mass of alcohol is 25÷( 1+25%)=20 (kg).
A: The mass of this barrel of wine is 20 kilograms.
I hope my answer is helpful to you ~