Question

Срочно!!!!! первая бригада может выполнить задание за 14 часов. за сколько часов вторая бригада может выполнить тоже задание, если две бригады при совместной работе выполняют его за 10 часов?

Answer 1

Х-задание
Х/14 — скорость 1
Х/10=х/14+х/у
Х/10=ху+14х/14у
14ху=10ху+140х
14ху-10ху-140х=0
4ху-140х=0
4х(у-35)=0
У-35=0
У=35
Ответ: 35 часов

Answer 2

Calculation of Time for the Second Brigade to Complete the Task

To determine the time it would take for the second brigade to complete the task when both brigades work together, we can use the concept of work rates.

Let's assume that the first brigade's work rate is represented by x (in units of work per hour), and the second brigade's work rate is represented by y (in units of work per hour).

According to the given information, the first brigade can complete the task in 14 hours when working alone, and both brigades together can complete the task in 10 hours.

Using the concept of work rates, we can set up the following equation:

14x = 10(x + y)

Simplifying the equation:

14x = 10x + 10y

4x = 10y

Now, we need to find the ratio between the work rates of the two brigades. Dividing both sides of the equation by 10y:

4x / 10y = 1

Simplifying further:

2x / 5y = 1

Cross-multiplying:

2x = 5y

Now, we can determine the relationship between the work rates of the two brigades. The work rate of the second brigade (y) is equal to 2/5 times the work rate of the first brigade (x).

Therefore, if the first brigade can complete the task in 14 hours, the second brigade can complete the same task in:

14 * (5/2) = 35 hours

So, the second brigade can complete the task in 35 hours when working alone.

Please note that the given information does not specify the work rates of the brigades or the nature of the task. The calculation is based solely on the given information and the assumption that the work rates remain constant.