Question

Два мастера выполняют определенную работу за 18 часов, второй рабочий выполняет эту работу за 27 часов. Сколько времени потребуется первому рабочему, чтобы выполнить работу? 60 часов 51 uac 54 uaca 56 часов 52 часа. Срочно помогите пожалуйста!!!!!! ​

Answer 1

Ответ:

54

Пошаговое объяснение:

За единицу примем работу.

1/18 - производительность двух рабочих.

1/27 - производительность 2-го рабочего.

1/18 -1/27=3/54 -2/54=1/54 - производительность 1-го рабочего.

1/(1/54)=1·54/1=54 ч потребуется 1-му рабочему выполнить работу.

Answer 2

Calculation of Time Required for the First Worker to Complete the Job

To determine the time required for the first worker to complete the job, we can use the concept of work rates. The work rate is defined as the amount of work done per unit of time.

Let's assume that the amount of work to be done is represented by "W" and the work rate of the first worker is represented by "R1". Similarly, the work rate of the second worker is represented by "R2".

According to the given information, the first worker completes the job in 18 hours, and the second worker completes the same job in 27 hours.

Using the formula:

Time = Work / Work Rate

We can calculate the time required for the first worker to complete the job as follows:

Time1 = W / R1

Time2 = W / R2

Since the amount of work to be done is the same for both workers, we can equate the two equations:

W / R1 = W / R2

To find the time required for the first worker, we need to solve for "Time1". Rearranging the equation, we get:

Time1 = (W / R1) = (W / R2) * R2 / R1

Substituting the given values, we have:

Time1 = (27 / 18) * 27 = 40.5 hours

Therefore, it will take the first worker approximately 40.5 hours to complete the job.

Please note that the given options of 60 hours, 51 hours, 54 hours, and 56 hours do not match the calculated result of 40.5 hours.