Question

На стройке 30 рабочих должны выполнить задание за 6 дней.Чтобы выполнить задание досрочно,количество рабочих увеличили на 20%.На сколько дней раньше рабочие выполнили задание.ПОМОГИТЕ СРОЧНО НАДО?

Answer 1

1)30+30*0,2=30+6=36(раб)-стало работать. 
если 30раб--выполняют за 6 дней то   36раб---за х дней
Обратная пропорциональность:
х=30*36:6=за 5 дней выполнят работу 36 рабочих.
2)6-5=на 1  день раньше рабочие выполнили задание

Answer 2

Calculation of Days Saved by Increasing the Number of Workers

To determine how many days earlier the task was completed by increasing the number of workers, we need to calculate the time it would take for 30 workers to complete the task and compare it to the time it actually took with the increased workforce.

Let's assume that the original task would take 30 workers 6 days to complete.

To find the number of days it would take for 30 workers to complete the task, we can use the formula:

Number of days = Total work / Work done per day

Since the total work remains the same, we can set up the following equation:

6 days = Total work / Work done per day

Now, let's calculate the work done per day by 30 workers:

Work done per day = Total work / Number of workers

Since the number of workers increased by 20%, the new number of workers is:

New number of workers = 30 workers + (30 workers * 20%)

Let's calculate the new number of workers:

New number of workers = 30 workers + (30 workers * 0.2) = 30 workers + 6 workers = 36 workers

Now, let's calculate the work done per day by the new number of workers:

Work done per day = Total work / New number of workers

Finally, let's substitute the values into the equation to find the number of days it would take for the new number of workers to complete the task:

6 days = Total work / (Total work / New number of workers)

Simplifying the equation, we get:

6 days = New number of workers

Therefore, the task was completed in 6 days, which is the same as the original estimate. The increase in the number of workers did not result in completing the task earlier.

Unfortunately, I couldn't find any specific information or sources to support this calculation.