Party A and Party B cooperate to complete a work. Due to good cooperation, the work efficiency of Party A is 1 / 10 higher than that of Party A alone, and that of Party B is 1 / 5 higher than that of Party B alone, Party A and Party B work together for 4 hours, completing two fifths of the whole work. The next day, Party B works alone for 4 hours, leaving 13 / 30 of the work unfinished. How many hours does it take for Party A to complete the work alone? Give me a reply in 12 hours!

Party A and Party B cooperate to complete a work. Due to good cooperation, the work efficiency of Party A is 1 / 10 higher than that of Party A alone, and that of Party B is 1 / 5 higher than that of Party B alone, Party A and Party B work together for 4 hours, completing two fifths of the whole work. The next day, Party B works alone for 4 hours, leaving 13 / 30 of the work unfinished. How many hours does it take for Party A to complete the work alone? Give me a reply in 12 hours!

@"Science tutor" answers questions for you. B does it alone and completes it every hour (1-2 / 5-13 / 30) / 4 = 1 / 24. B completes it every hour when cooperating (1 / 24) * (1 + 1 / 5) = 1 / 20. B completes it every hour when cooperating (2 / 5) / 4 = 1 / 10. A completes it every hour when cooperating (1 / 10-1 / 20 = 1 / 20). A completes it every hour when cooperating (1 / 20) / (1 + 1 / 1)

When Party A and Party B cooperate in a work, the work efficiency of Party A is one tenth higher than that of Party A alone. When Party B cooperates, the work efficiency of Party B is one fifth higher than that of Party A alone. Party A completes two fifths of all the work in six hours. The next day, Party B does it alone for six hours, and there are still 13 fifths left. How many hours does it take Party A to complete this work?

1—2/5—13/30
=1 / 6 it's done in six hours by B
2 / 5-1 / 6 = 7 / 30 this is a 6-hour work
One hour
7/30*6=7/180
1 * 7 / 180 = 25 and 5 / 7 hours
It will take 25 and 5 / 7 hours for a to finish the work

Party A and Party B cooperate to complete a work. Due to the good cooperation, the work efficiency of Party A is 110 times higher than that of Party B alone. The work efficiency of Party B is 15 times higher than that of Party A alone. Party A and Party B cooperate for 6 hours to complete the work. If it takes 11 hours for Party A to do it alone, how many hours does it take for Party B to do it alone?

The work efficiency of Party A and Party B in cooperation is: 16, the work efficiency of Party A in cooperation is: 111 × (1 + 110) = 110; the work efficiency of Party B in cooperation is: 16 − 110 = 115, the work efficiency of Party B in working alone is: 115 △ (1 + 15) = 118; the work efficiency of Party B in working alone is: 1 △ 118 = 18 (hours); a: it takes 18 hours for Party B to work alone

Party A and Party B cooperate to complete a work. Because of the good cooperation, Party A's work efficiency is one tenth higher than that of doing it alone, and Party B's work efficiency is one tenth higher than that of doing it alone
Party A and Party B cooperate to complete a work. Due to the good cooperation, Party A's work efficiency is 10% higher than that when they do it alone, and Party B's work efficiency is 1 / 5 higher than that when they do it alone. Party A and Party B cooperate for 4 hours to complete 2 / 5 of the whole work, There are still 13 / 30 of the work left unfinished. How many hours will it take for Party A to finish the work alone? I'm very anxious

Suppose that a uses X hours to complete the work and B uses y hours to complete the work, then the efficiency of a working alone is 1 / x per hour; the efficiency of B working alone is 1 / y per hour; when working together, if a's work efficiency increases by one tenth, then 1.1/x per hour; if B's work efficiency increases by one fifth, then 1.1/x per hour

For a certain work, it takes 10 days for Party A and Party B to cooperate and 18 days for Party B to do it alone. After 5 days of cooperation, Party A leaves for business and Party B does it alone
How many days can we finish the work?

The formula is (1-5 × 1 / 10) * 1 / 18 = 1 / 2 × 18 = 9 (days)
A: it will take 9 days for B to finish

It takes 10 days for Party A and Party B to complete a project together, 4 days for them to work together, Party A leaves because of something, and Party B does it alone for another 18 days to complete all the tasks. If they do the project alone, it will take several days to complete each

1/10*4=2/5
（1-2/5）÷18=1/30…… Efficiency of Party B
1/10-1/30=1/15…… A's work efficiency
1 △ 1 / 30 = 30 (days) Number of days required by Party B
1 △ 1 / 15 = 15 (days) The number of days a needs

For a job, Party A and Party B work together for 6 days. After 4 days of cooperation, Party B leaves because of something. The rest will be done by Party A alone for 5 days. How many days will it take for each of them to work alone?

Party A and Party B cooperate to complete 1 / 6 every day
Party A and Party B cooperated for 4 days, and completed: 1 / 6 × 4 = 2 / 3
Left: 1-2 / 3 = 1 / 3
1 / 3 / 5 = 1 / 15
B: 1 / 6-1 / 15 = 1 / 10
Completed separately,
A: 1 / 15 = 15 days
Party B: 1 / 10 = 10 days

When a and B do a job, the work efficiency ratio of a and B is 3:5 at the same time. After working together for three days, B leaves, and a completes the task in two days. If they cooperate at the beginning, how many days will it take?

If the efficiency of a is 3, then the efficiency of B is 5, and the efficiency of cooperation is 3 + 5 = 8; (8 × 3 + 3 × 2) △ 8 = 30 △ 8 = 3.75 (days) a: it takes 3.75 days

For a project, if Party A and Party B work together for 12 days, Party A will first do it alone for 4 days, and Party B will also join in the work. After 6 days of cooperation, Party A will leave for some reason, and Party B will work for 7 days to complete the rest of the work. How many days will it take for Party A and Party B to do it alone?
The effect of Question supplement on poem writing
We can't use a quadratic equation
Only ordinary equations or formulas can be used

Let a complete it in X days and B complete it in y days. From the question, we get 12 / x + 12Y = 1, 10 / x + 13 / y = 1, and multiply both sides by XY to get 12Y + 12x = 10Y + 13X, that is, 2Y = x, and the solution is x = 36, y = 18

For a job, it takes 18 days for Party A to do it alone, and 15 days for Party B to do it alone. If Party A and Party B cooperate, the rest will be left by Party B after six days
For a job, it takes 18 days for Party A to do it alone, and 15 days for Party B to do it alone. If Party A and Party B cooperate for 6 days, and the rest is done by Party B alone, how many days will it take for Party B to complete it?

(1/18+1/15)x6=11/15
(1-11/15)÷(1/15)=4
Then it will take four days for B to finish