(1) Write the equivalence relation that meets the meaning of the question.
(2) List the equation calculation:
2. 680 kilograms of rice per square meter of paddy field. Trapezoidal paddy field with upper bottom17m, lower bottom 8m and height 7m. How many kilograms of rice can this paddy field produce?
3. Triangular glass with a bottom of 12.5 decimeter and a height of 7.8 decimeter. If the price of glass per square decimeter is 0.8 yuan, how much does it cost to buy this kind of glass?
4. A construction site transported 32.5 tons of stones on the first day, which was four times more than that on the second day. How many tons of stones were delivered the next day?
5. A grain transportation team, with 5 vehicles transporting 22.5 tons of grain. According to this calculation, how many vehicles are needed to transport 1 18 tons of grain?
6. The processing workshop has to process 875 parts, which has been processed for 3.5 hours and 50 parts per hour. The rest will be processed at an average speed of 56 pieces per hour. How many hours will it take to finish this task? (Equation solving)
7. The school organized teachers and students to watch movies, with 950 students and 27 teachers. 8 yuan, an adult, and 4 yuan, a student. More than 30 people can buy group tickets, group tickets to 6 yuan. Please design the most economical ticket purchase scheme. How much will it cost at least?
8. A clothing factory used to make a 3.8-meter cloth. After changing the cutting method, each set saves 0.2 meters of cloth. Fabric used to make 1800 suits. How many sets can you make now?
9. Two trains, A and B, leave from two places 300 kilometers apart at the same time. Two hours later, they are still 80 kilometers apart. Car A is 60 kilometers per hour, and car B is how many kilometers per hour? (column equation solution)
10, Miss Wang has to walk 6 kilometers from school to the county seat. I was going to ride a bike, and I will arrive in 20 minutes. Later, it was changed to walking, which was 200 meters less than cycling. How many points does it take to walk to the county seat?