2. Party A and Party B can complete a project in 8 days, and Party B and Party C can complete it in 6 days; The cooperation between Party C and Party D can be completed in 12 days; Then how many days can the cooperation between Party A and Party B be completed?
3. A project will be completed by Party A alone for 20 days and Party B alone for 30 days. If Party A does it for a few days first and then Party B does it, it will take 25 days to finish it. Q: How many days do A and B work respectively?
4. To manufacture a batch of parts, Party A and Party B can cooperate for 8 days, and Party A can complete it alone in 12 days. If Party B moves ahead a few days, Party A will continue to do it, and it will take both parties 15 days to complete all the work.
5. A project can be completed within 30 days after the cooperation between Party A and Party B. 12 days later, the remaining projects will be completed by Party A alone in 24 days. How many days does it take for this project to be completed by Party A and Party B alone?
6. With the cooperation of Party A and Party B, a project can be completed in 12 days; if Party A works in 10 days, Party B will continue to work in 15 days. Q: How many days will it take for Party A and Party B to complete this project alone?
7. It takes 2.4 days for Party A and Party B to complete a project, while it takes 6 days for Otsuichi to complete a project alone. If Party B starts work on the first day and Party A continues to do it on the second day, how many days will it take to complete this project?
8. A project can be completed in 0/2 days for Party A, 0/5 days for Party B and 0/8 days for Party C. Today, Party A starts work on the first day and Party B does it on the second day. On the third day, Party C will do it in Liao's order. How many days will it take to complete?
9. An express train and a local train leave from Station A and bilibili at the same time. /kloc-After 0/2 hour rendezvous, it will take 8 hours for the express train to reach bilibili, and several hours for the local train to reach Station A?
10. A job. A will be finished by B in five hours, and it will be finished in three hours. After B has done it for 9 hours, A can do it and finish it in 3 hours. So how many hours can B do after A does 1 hour?
1 1. Children's Map Give Children Cookies. If only for large classes, each person gets 15 acetylene. If you give it to children in large and small classes, it's 6 yuan each. If it is only given to children in small classes, how much will each person get?
12. There are two water pipes A and B in the water area. Open pipe A for 3 hours and 20 minutes to fill half the pond, and then open pipe B to inject water together. It takes 2 hours 15 minutes to fill the pond. If pipe B can be filled with 13 cubic meters of water every hour, what is the volume of this pool?
13. There are two groups of workers, A and B, who are both working on the same project. If the 9th is completely completed by Group A and the 27th is completely completed by Group B, how many days can this project be completed by the cooperation of Group A and Group B now?
14. There is a project, 12 is completed by Party A alone, and 18 is completed by Party B alone. If Party A has a day off, how many days will it take to finish?
15. For a project, if Party A works alone for 2 hours, the clock for completing all the work will be completed. If three people cooperate at first, how many hours will it take to complete all the projects?
16. Party A and Party B completed a project in eight days, Party B and Party C 10 and Party A and Party C 12. How many days will it take for Party A, Party B and Party C to complete this project now?
17. When two people cooperate on a project, it takes 15 for Party A to stop working for five days, and it can be completed in 12 days if Party A does not stop working. Q: How many days does it take to do this project independently?
18. A job, completed alone, takes 12 days to complete. B takes 15 days to complete, and C takes 20 days to complete. Now Party A and Party B will cooperate for 4 days, and then Party C will participate. Q: How many days does it take C to participate in the project?
19. If a job is completed alone, Party A needs 10 days, Party B needs 15 days, and Party C needs 20 days. Now Party A, Party B and Party C are cooperating, but Party A has to leave halfway and it will take 6 days to complete it. Q: A left after working for a few days?
20. Two people ride bicycles from the same place on the ring road and walk back and forth at the same time. It is now known that it takes 70 minutes for A to walk once. If A and B meet at the 45th minute after departure, how many minutes will it take them to walk?
2 1. Party A and Party B can complete a project in 8 days, and Party B and Party C can complete it in 6 days; The cooperation between Party C and Party D can be completed in 12 days; Then how many days can the cooperation between Party A and Party B be completed?
22. A project will be completed by Party A alone for 20 days and Party B alone for 30 days. If Party A does it for a few days first and then Party B does it, it will take 25 days to finish it. Q: How many days do A and B work respectively?
23. To manufacture a batch of parts, Party A and Party B can cooperate for 8 days, and Party A can finish it alone in 12 days. If Party B continues to do it in a few days, it will take 15 days for both parties to work for a few days.
24. A project can be completed in 30 days after the cooperation between Party A and Party B. 12 days later, the remaining projects can be completed by Party A alone, and it can be completed in 24 days. Q: How many days will it take for this project to be completed by Party A and Party B alone?
25. With the cooperation of both parties, a project can be completed in 12 days. If Party A works in 10 days, Party B will continue to work in 15 days. Q: How many days will it take for Party A and Party B to complete this project alone?
26. It takes 2.4 days for Party A and Party B to complete a project, while it takes 6 days for Otsuichi to complete a project alone. If Party B starts work on the first day and Party A continues to do it on the second day, how many days will it take to complete this project?
27. A project can be completed in 0/2 days by Party A, 0/5 days by Party B and 0/8 days by Party C. Today, Party A starts work on the first day and Party B finishes it on the second day. On the third day, I did it in Liao's order, again and again. Q: How many days can this be completed?
28. An express train and a local train leave from Station A and bilibili at the same time. /kloc-After 0/2 hour rendezvous, it will take 8 hours for the express train to reach bilibili, and several hours for the local train to reach Station A?
29.a's work will be completed by B after 5 hours, and it will be completed in 3 hours. After B has done it for 9 hours, A can do it and finish it in 3 hours. So how many hours can B do after A does 1 hour?
30. Children's charts give children cookies. If only for large classes, each person gets 15 acetylene. If you give it to the children in the big class and the small class, everyone will get 6 cookies. How many cookies will each person get if they are only given to children in small classes?
3 1. There are two water pipes A and B in the waters. Open pipe A for 3 hours and 20 minutes to fill half the pond, and then open pipe B to inject water together. It takes 2 hours 15 minutes to fill the pond. If pipe B can be filled with 13 cubic meters of water every hour, what is the volume of this pool?
There are two groups of workers, A and B, who are both working on the same project. If No.9 is completely completed by Group A and No.27 is completely completed by Group B, how many days can this project be completed with the cooperation of Group A and Group B workers?
33. There is a project, which was completed by Party A and Party B separately in 12 and 18. If Party A takes a day off, how many days will it take to finish?
34. For a project, if Party A works alone for 2 hours, the clock to complete all the work will be completed. If three people cooperate at first, how many hours will it take to complete all the projects?
35. Party A and Party B completed a project in 8 days, Party B and Party C 10 days, and Party A and Party C 12 days. How many days will Party A, Party B and Party C complete this project now?
36. Two people work on a project together. Party A stopped work for five days, which was completed on 15. If Party A does not stop work, it will be completed in 12 days. Q: How many days does it take to do this project independently?
37. A job, completed alone, takes 12 days to complete. B takes 15 days to complete, and C takes 20 days to complete. Now Party A and Party B will cooperate for 4 days, and then Party C will participate. Q: How many days does it take C to participate in the project?
38. If a job is completed alone, it will take 65,438+00 days for Party A, 65,438+05 days for Party B and 20 days for Party C. Now, Party A, Party B and Party C are cooperating, but Party A has to leave halfway and it will take 6 days to complete it. Q: A left after working for a few days?
39. It takes 15 days for team A to do a project alone, and 20 days for team B to do it alone. How many days does it take for two teams to work together?
40. It takes Party A 6 hours to do a job alone, Party B 4 hours and Party C 3 hours. How many hours does it take three people to work together?
4 1. A pool is equipped with three water pipes, A, B and C. A and B are water inlet pipes and C is water outlet pipe. By opening the first tube, the empty pool can be filled in 2 hours, the second tube can be filled in 3 hours and the third tube can be filled in 4 hours. Three pipes are open at the same time. How long will it take to fill the empty pool?
42. A project can be completed by Party A in eight days, while Party B can only complete four fifths of the project in eight days. If Party A cooperates with Party B, how long will it take to complete the project?
43. Party A completes a batch of parts 12 days, and Party B completes it in 8 days ... Party A and Party B cooperate for 3 days first, and Party B completes the rest alone. How many days will it take?
44. The cultural and educational printing house binds a batch of review materials. The master can bind 3/4 in 9 days and the apprentice can bind 5/6 in 20 days. With the cooperation of master and apprentice, how many days can the binding be completed?
45. There is a project. Team a and team b 12 days, team c and team b 20 days, team a and team c 15 days. How many days does it take for Team A, Team B and Team C to work together?
46. If a route is repaired by team A alone, it will take 30 days to complete, and team B will repair it alone for 5 days to complete 1/4 of this road. After three days of joint repair by team A and team B, the rest was completed by team B alone. How many days will it take to complete the repair?
47. A project takes 9 days to complete by itself and 6 days to complete by itself. After doing it alone for 4 days, B and A did it together. How many days will it take to complete?
48. A project can be completed in 0/0 day by both parties, 8 days by both parties and 5 days by Party B alone. How many days will it take if B does this project alone?
49. A project is completed by a single team, with team A 15 days and team B 45 days. How many days does it take for two teams to work together?
50. Team B dug a canal. It takes 8 days for Team A to dig alone, and it takes 12 days for Team B to dig alone. Now, after two teams dug for a few days at the same time, team B was transferred, and the remaining team A finished digging in three days. How many days will Bravo dig?
5 1. For a project, team A will do it for 30 days and team B will do it for 40 days. Team A did it for a few days, then team B did it, and it took * * * 35 days to complete the task. How many days does Team A work?
52. A project will be completed by itself in 20 days and 30 days. A asks for leave for 2 days and B asks for leave for a few days. The task took 16 days from start to finish. B how many days off?
53. A project was originally planned to be completed by Party A and Party B in 30 days, but after 8 days of cooperation, Party B took a leave of absence from work, so it took 12.5 days longer than originally planned to complete the task. How many days does it take Party A to finish the mountain work alone?
54. Two trains leave from A and B at the same time. It takes 20 hours for the express train to complete the journey, and 30 hours for the local train to complete the journey. 15 hours later, the two cars meet. It is known that the express train stops for 4 hours and the local train stops for several hours.
55. Two cars B leave from A and B at the same time, in opposite directions. After four hours of meeting, car A continued to drive for three hours to reach place B, and car B was driving at a speed of 24 kilometers per hour. How many kilometers is the total length?
56. It takes 40 days for Team A to build a road, and 24 days for Team B alone. Now two teams are working from both ends at the same time, and they meet 750 meters away from the midpoint. How long is this road?
57. For a project, with the cooperation of Team A and Team B, 9/40 of the whole project can be completed every day. Team A can complete 7/8 of the whole project by working alone for 3 days and team B for 5 days. If the whole project is done by team B alone, how many days can it be completed?
58. Group B cooperates on a project, which can be completed in 20 days. Now, after 6 days' work by Team A and 8 days' work by Team B, 1 1/30 of this project has been completed. How many days does it take for two teams to complete the project alone?
59. A project can be completed by Party A alone for 63 days and then by Party B alone for 28 days. If both parties make joint efforts, it will take 48 days to complete. Now A does it alone for 42 days, and then B does it alone. How many more days will it take?
60. Party A and Party B completed a project in six days. Individually, it takes the same time for A to complete 1/3 and B to complete 1/2. How efficient are A and B?
6 1. Ships sail at the same speed. It takes 3 days from city A to city B, and 4 days from city B to city A. How many days does it take to drift from city A to city B?
62. A bus and a truck set off from Station A and bilibili at the same time and met six hours later. After the encounter, the two cars continued to move at the original speed, and it took another four hours for the bus to reach the second place. How many hours does it take for the truck to get to A?
63. A project can be completed in six days if a team works alone. Team A has three days' work, while Team B has four days to finish it. After two days of cooperation, team B did it alone. How many days will it take Team B to finish?
64. It takes a person 8 hours for Master Zhang to finish a job, and it takes 12 hours. Now two people work together, how many hours will it take to finish?
65. It takes 20 days for Team A and 30 days for Team B to build a new road ... How many days does it take for both teams to repair at the same time?
66. It takes 12 days for Group A to dig a canal, and 15 days for Group B. Now Group A digs for 4 days, and then two groups dig again. How many days will it take to complete?
67. A project will take 20 days for team A and 25 days for team B.. Now, two teams will work together for two days. How many days will it take for Team A to do it alone?
68. Two engineering teams in Group B build a railway. It takes 12 days for the two teams to build together, and 20 days for Team A to build alone. How many days will it take B team to repair it alone?
69. It takes 20 days for Workshop A to process a batch of clothes and 30 days for Workshop B.. How many days will it take for two workshops to complete half at the same time?
70. Party A and Party B finish a job within 12 days, and it is known that the efficiency ratio of Party A and Party B is 1:3. How many days does it take two people to do it alone?
7 1. For a project, Party A will work alone for 20 days, and Party B will work alone for 12 days. After 6 days of cooperation between Party A and Party B, Party B will continue to complete it. How many days can Party B do it again?
72. A project takes 9 days to complete, 65,438+02 days and 65,438+05 days to complete. If Party A and Party C work for 3 days first, and Party A leaves for some reason, Party B takes over Party A's work and asks how many days it takes to complete the project.
73. A factory plans to process 408 pieces in 15, and 24 pieces every day in the first three days. Q: How many parts will be processed every day in the future to complete the task within the specified time?
74. It takes 65,438+00 days for a project to be completed by Party A alone, and 6 days for Party B alone. Now Party A will do it for 2 days first, and then Party B will join the cooperation. How many days will it take to complete this project?
75. The water inlet pipe of a pool can fill the pool in 2 hours, and the water outlet pipe can empty the pool in 3 hours. If two pipes are opened at the same time, how many hours can an empty pool be filled?
76. How many days does it take for Party A and Party B to complete a project in 12 days, Party B and Party C in 15 days?
77. It takes 65,438+03 days for Party A and Party C to cooperate on a project. If Party C has two days off, Party B will have to work four more days, or both parties will cooperate for one day. How many days does it take Party A to complete this project alone?
78. It takes 12 hours for the master to process a batch of parts alone, and 15 hours for the apprentice to process them alone. The master and the apprentice work together to complete the task, and the master processes 20 more than the apprentice. How many parts are there in this batch?
79. A section of the road can be completed by two teams 15 days, and team A will be alone for 6 days.
80. (1) How many days will it take for Team B to complete this section alone? (2) How many days will it take for Team B to walk this road alone? (3) Team A and Team B repair together. How many days does it take to complete this section?
8 1. The express train needs 10 hour from A to B, and the local train needs 12 hour from B to A. The express train and the local train leave relatively at the same time. How many hours did the two trains meet?
82. A manuscript is copied by Party A alone 10 hour and copied by Party B alone 12 hour. Now, after two hours of copying by both parties, Party B has something to leave. How many hours will it take for a copy to be completed?
83. It takes 12 hours for Party A and Party B to process a batch of parts, and 20 hours for Party B alone. When Party A and Party B jointly complete the task, how many parts will Party A make for this batch of parts? How much does b account for in this batch of parts?
84. A project can be completed by two teams 12 days, and it takes 36 days for team A to complete it alone. If team A is required to do it for six days and team B for eight days, how many odd jobs can be completed? How many days can this project B be completed by one person?
85. For a project, Party A works alone for 20 days, and Party B works alone for 12 days. After 6 days of cooperation between Party A and Party B, Party B will continue to complete it. How many days can Party B do it?
86. A project takes 9 days to complete, 65,438+02 days and 65,438+05 days to complete. If Party A and Party C work for 3 days first, and Party A leaves for some reason, Party B takes over Party A's work and asks how many days it takes to complete the project.
87. A project takes 9 days to complete, 65,438+02 days and 65,438+05 days to complete. If Party A and Party C work for 3 days first, and Party A leaves for some reason, Party B takes over Party A's work and asks how many days it takes to complete the project.
88. A factory plans to process 408 pieces in 15, and 24 pieces every day in the first three days. Q: How many parts will be processed every day in the future to complete the task within the specified time?
89. Project A takes 65,438+00 days to complete and Project B takes 6 days to complete. Now Party A will do it for 2 days first, and then Party B will join the cooperation. How many days will it take to complete this project?
90. The water inlet pipe of a pool can fill the pool in 2 hours, and the water outlet pipe can empty the pool in 3 hours. If two pipes are opened at the same time, how many hours can an empty pool be filled?
9 1. How many days does it take for Party A and Party B 12 days, Party B and Party C 15 days to complete a project?
92. There are a number of books. Xiao Ming can bind 3/4 in 9 days and 5/6 in 20 days. How many days can Xiaoming and Xiaoli cooperate to complete the installation?
93. For a project,19 can be completed by Party A in 20 days and110 can be completed by Party B in 9 days. How many days does it take for Party A and Party B to jointly complete half of this project?
94. The master and the apprentice processed a batch of parts, and two days later, they had already processed 1/3 of the total parts. If all these parts are processed by the master alone, it will take 10 days to complete. If all these parts are processed by the apprentice, how many days will it take?
95. It takes 65,438+00 hours to complete a single assignment, 65,438+02 hours for one person B and 65,438+05 hours for one person C.. How many hours do three people work together to finish half the work?
96. From A to B, the local train 15 hours and the express train 10 hours. Five hours after the local train leaves from B, the express train leaves from A. How many hours will it take for the two trains to meet?
97. Party A and Party B can complete a project in 8 days; The cooperation between b and c can be completed in 6 days; The cooperation between Bing and Ding Can will be completed in 12 days. So how many days can the cooperation between A and D be completed?
98. There are a number of machine parts. It takes Party A eight and a half days to do it alone, which is 1 day and a half more than Party B. After four days of cooperation, there are 2 10 parts left, all of which are made by Party A alone. How many parts did Party A make from beginning to end?
99. Two people ride bicycles from the same place on the ring road at the same time, with their backs to each other. It is now known that A takes 70 minutes to walk around. If A and B meet at the 45th minute after departure, how many minutes does it take for B to walk around?
100. For one project, Team B worked alone for 4 days, then Team A cooperated with Team C for 6 days, and the remaining projects were completed by Team A alone for 9 days. It is known that Team B has completed 1/3 that Team A has completed, and Team C has completed twice that of Team B.. How many days does it take for Team A, Team B and Team C to finish alone?
10 1. A pool has two water inlet pipes, A and B. 1/6 hours can be filled; Single-port B tube can fill the pool in 1/7 hours. If both pipes A and B are opened at the same time, how long will there be 1/4 unfilled water in the pool?
102. If a canal is dug in a village, it will take team A 12 days to dig it alone, and team B 15 days. Now team A and team B have been digging together for two days, and team C has also participated, and it will be completed three days after team C joined. If Team C digs alone, how many days will it take to finish?
103. The reservoir is equipped with a water inlet pipe and three water outlet pipes, and the water outlet speed is the same. Open the inlet pipe for 20 minutes to fill the empty pool, and open the outlet pipe for 45 minutes to fill the pool. There are 2/3 pools. If the four pipes are opened together, how many minutes will there be 2/5 left in the pool?
104. 12 days can complete a project independently. If Party A works alone for 3 days, the remaining work will be completed by Party B, and it will take another 6 days. If Party A works alone for 6 days, how many days will it take?
105. Two teams dug a canal in 30 days. It's been 12 days now, and the rest will be dug by team B, which will take 24 days to finish. How many days does it take for Team B to dig this canal?
106. Passenger cars and trucks leave from Station A and bilibili relatively simultaneously. After 2 hours and 24 minutes, the bus ran 9.6 kilometers more than when the truck met. It is known that the bus travels from Station A to bilibili for 4 hours and 30 minutes. What are the speeds of buses and trucks?
107. For a project, Party A and Party B need to do it alone 18, 27 days. If Party A does it for a few days and Party B continues to do it, it will take * * * 20 days to complete it. Ask Party A and Party B to complete the proportion of workload.
108. Make a batch of children's toys. Group A needs 10 day, Group B needs 12 day, and Group C can produce 64 pieces every day. If Group A and Group B cooperate for 4 days, 256 pieces are still unfinished. How many days does it take for three groups to make these toys?
109. It takes 10 days for Party A to do a job alone, and 15 days for Party B to do a job alone. How many days can Party A and Party B cooperate to complete 80% of the work?
1 10. For a project, it takes 12 days for Party A and 18 days for Party B to do it alone. How many days can two people work together to complete two-thirds of the project?
1 1 1. For a project, it takes 18 days for Party A, 15 days for Party B and 6 days for two people to do it together. How many days do you want Party B to do the rest?
1 12. It takes 16 days for Party A to repair a road alone and 24 days for Party B. If Party B repairs it for 9 days first, how many days will it take for Party A and Party B to repair it together?
1 13. Party A 16 days and Party B 12 days can complete a project .. Now B does three days and A does the rest. How many days will it take to complete this project?
QQ:54383838