Party A and Party B have worked together to process a batch of parts and completed the task in 4 hours, which is 7 / 12 of all tasks completed by Party A. It is known that group A processes 32 more parts per hour than group B, and how many parts are processed in two hours

When the task is completed, team a completes 7 / 12 of all tasks, and team B completes 5 / 12 of all tasks. Therefore, the efficiency ratio of team a and team B is 7 / 12:5 / 12, which is 7:5,
Group A: 32 / (1-5 / 7) = 112 per hour,
Group B: 112 * 5 / 7 = 80 per hour
The two groups processed (112 + 80) * 2 = 384 in 2 hours

5 △ 6 = fraction 67 △ 20 = fraction 22 △ 19 = fraction
A number, divided by 3 to 2, divided by 4 to 3, divided by 5 to 4

Five sixths, respectively
sixty-seven-twentieths
twenty-two-nineteenths

1. The height of a cylinder is 8 cm and the circumference of its bottom is 12.56 cm. If it is cut vertically along its bottom diameter, the surface area will be increased by () cm
2. There is a piece of rectangular paper, 6cm long and 4cm wide. After it is rolled horizontally or vertically into a cylinder, the volume of () is large
① The perimeter of the bottom surface is 4cm. ② the perimeter of the bottom surface is 6cm. ③ it can not be determined
3. A cylindrical glass tank with a bottom diameter of 4 decimeters is filled with water. If a cone with a bottom radius of 1 decimeter and a height of 3 decimeters is put in, the cone will be immersed in the water and the water will not overflow. How many decimeters has the water surface in the glass tank increased? (to calculate the formula)

1. The height of a cylinder is 8 cm and the circumference of its bottom is 12.56 cm. If it is cut vertically along its bottom diameter, the surface area will increase by (64) square cm
2. There is a piece of rectangular paper, 6cm long and 4cm wide. It has a large volume when it is rolled horizontally or vertically into a cylinder
① The perimeter of the bottom surface is 4cm. ② the perimeter of the bottom surface is 6cm. ③ it can not be determined
3. A cylindrical glass tank with a bottom diameter of 4 decimeters is filled with water. If a cone with a bottom radius of 1 decimeter and a height of 3 decimeters is put in, the cone will be immersed in the water and the water will not overflow. How many decimeters has the water surface in the glass tank increased? (to calculate the formula)
4 / 2 = 2 decimeters
1 / 3 * 3.14 * 1 * 1 * 3 / (3.14 * 2 * 2) = 0.25 decimeter

Primary school mathematics Oh, very simple
Teachers account for 3 / 5 of all staff, administrators account for 3 / 10 of all staff, and the rest are workers
Why do you write like this.

6:3:1

Party A and Party B have worked together to process a batch of parts and completed the task in 4 hours, which is 7 / 12 of all tasks completed by Party A. It is known that group A processes 32 more parts per hour than group B, and how many parts are processed in two hours