Party A and Party B set out from two places at the same time, and the first meeting was 50 meters away from the midpoint. After they arrived at two places, Party A and Party B immediately turned around and walked back. So, Party A and Party B met for the second time at a distance of 0/00 meters from Party A/KLOC-to find the distance between Party A and Party B. ..
3. An engineering vehicle loads cement poles from the warehouse and transports them to the roadside only 1000 meters away from the warehouse, requiring that poles be planted every 100 meters on one side of the road. It is known that the engineering vehicle can only transport four poles at a time, and it is required to complete the transportation task of 18 poles and transport them back to the warehouse. If the fuel consumption of an engineering vehicle is m liters per kilometer (the fuel consumption is only related to the driving distance) and the gasoline is n yuan per liter, seek the lowest fuel consumption to complete this task.
Many students live in the dormitory. If there are 4 people in each room, that's 20 people. If there are 8 people in each room, one room will be empty and not satisfied. How many dormitories and students are there?
5. A basketball and volleyball match, * * * has 48 teams and 520 athletes, including basketball team 10 and volleyball team 12. How many teams are there in basketball and volleyball?
6. A factory bought 56 tons of materials A and B, which cost 9860 yuan. If material A is per ton 190 yuan and material B is per ton 160 yuan, how many tons will they buy?
7. Someone bought two stocks, A and B, for 24,000 yuan, and sold them when A stock appreciated 15% and B stock fell 10%, making a profit 1350 yuan. How much did someone buy?
8. There are two types of bonds, A and B, with annual interest rates of 65,438+00% and 65,438+02% respectively. Existing 400 yuan bonds, a year later, 45 yuan will have income. Ask how much each bond has.
9. There are three kinds of beverage packaging, and 1 medium bottle is 20 cents cheaper than 2 small bottles, and 1 large bottle is 40 cents more expensive than 1 medium bottle and 1 small bottle. Large, medium and small bottles 1 bottle, 9 yuan needs 6 cents. How much are the three drinks per bottle?
10. A class of students went to Beishan 18km for an outing. There is only one car, so they have to be divided into two groups. Group a takes the bus first, and group b walks. Group A got off and walked, and the car returned to meet with Group B. Finally, both groups arrived at Beishan Station at the same time. Given the speed of 60km/h and the walking speed of 4km/h, find the distance from point A to Beishan Station.
10. The first-year students went to the restaurant for a meeting. If every four people sit on a bench, 28 people have no place to sit. If six people are sitting on a bench, find out the number of first-year students and benches.
1 1. Two trains leave from two opposite places at the same time, 9 10 kilometers apart, and meet in 10 hours. If the first train leaves 4 hours and 20 minutes earlier than the second train 1, then meet after the second train leaves 8 hours and find the speed of the two trains.
12. Buy Class A books 10, Class B books 16 * * Pay 4 10 yuan. Books of Class A are more expensive than books of Class B 15 yuan. Ask how much a and b books cost each.
13. Party A and Party B set out from Party A and Party B at the same time. They met for the first time 50 meters outside the midpoint of Party A, and turned back immediately after arriving at Party B and Party A. As a result, Party A and Party B met for the second time at a distance of 100 meters from Party A, and sought the distance between Party A and Party B. 。