Question

Двое рабочих, работая вместе, выполнили всю работу за 5 дней. Если бы первый рабочий работал в 2 раза быстрее, а второй - в двв раза медленей,то то всю работу они выполнели за 9 дня. За сколько дней выполнил бы эту работу первый рабочий?​

Answer 1

Ответ:

5-2=3

9-3=6

Пошаговое объяснение:

Правильно наверное... проверьте

Answer 2

Problem Analysis

We are given that two workers completed a job together in 5 days. If the first worker worked twice as fast and the second worker worked twice as slow, they would have completed the job in 9 days. We need to determine how many days it would take for the first worker to complete the job alone.

Solution

Let's assume that the first worker's rate of work is x (in terms of the fraction of the job completed per day). Therefore, the second worker's rate of work would be x/2 (since the second worker is twice as slow).

From the given information, we can set up the following equation: ``` 5(x + x/2) = 9 ```

Simplifying the equation: ``` 5(3x/2) = 9 15x/2 = 9 15x = 18 x = 18/15 x = 6/5 ```

Therefore, the first worker's rate of work is 6/5 (or 1.2 times the job completed per day).

To find the number of days it would take for the first worker to complete the job alone, we can set up the following equation: ``` (6/5) * d = 1 ```

Simplifying the equation: ``` 6d/5 = 1 6d = 5 d = 5/6 ```

Therefore, it would take the first worker 5/6 of a day to complete the job alone.

Answer

The first worker would complete the job alone in 5/6 of a day.