2. The number of team A is 80% of that of team B. If 40 people are transferred from team B to team A, the number of the two teams is the same. How many people are there in Team B?
The fruit shop sent 500 kilograms of apples, pears and oranges. The mass ratio of apples to pears is 3:2, and the mass of oranges is 5/8 of that of pears. How many kilograms are oranges less than pears?
4. In the alcohol solution of cylinder A, cylinder B and cylinder C, the content of pure alcohol is 48%, 62.5% and 2/3 respectively. It is known that the total amount of alcohol solution in cylinder A is 65,438+000 kg, in which the amount of alcohol solution in cylinder A is equal to the amount of alcohol solution in cylinder B and cylinder C. After the three cylinders are mixed, the percentage of pure alcohol will reach 56%. So, what is the regional content of pure alcohol in cylinder C?
5. Interest group activities were held in Huangling Primary School, with12 students and 2/3 boys. What percentage of the total number of boys in school?
6. The ratio of male employees to male employees is 4:5, and there are 4 more female employees than male employees. How many men and women are there?
7. The ratio of sand and gravel is 7:9, and the sand is less than gravel 10 ton. How many tons of sand and gravel are there?
8.36 tons of sand and gravel, sand and gravel ratio 1:8, how many tons of sand and gravel are there?
9. A tree with a rectangular circumference is 88CM, and its length-width ratio is 4:7. How many centimeters is the length and width of a rectangle? What is the area?
10. There are 1200 books in a batch. One quarter of them are allocated to lower grades, and the rest are allocated to middle, high, low, middle and high grades in a ratio of 4:5.