Question

Трое маляров могут закончить работу за 5 дней. Для ускорения работы добавили еще двух маляров. За сколько дней они закончат работу, если все маляры работают с одинаковой производительностью?

Answer 1

3*5/(3+2)=3 дня закончат

Answer 2

Problem Analysis

We are given that three painters can complete a job in 5 days. We need to determine how many days it will take for the job to be completed if two additional painters are added, assuming all painters work at the same productivity level.

Solution

To solve this problem, we can use the concept of man-days. A man-day represents the amount of work one person can complete in one day. If three painters can finish the job in 5 days, it means that the total work required is equivalent to 3 painters working for 5 days, which is 3 * 5 = 15 man-days.

Now, if we add two more painters, the total number of painters becomes 3 + 2 = 5. Since all painters work at the same productivity level, we can assume that each painter contributes equally to the work. Therefore, the number of man-days required to complete the job remains the same, which is 15 man-days.

To find the number of days it will take for the job to be completed with five painters, we divide the total number of man-days required (15) by the number of painters (5). This gives us the number of days required for the job to be completed.

Calculation

Number of painters = 5 Total man-days required = 15

Number of days required = Total man-days required / Number of painters Number of days required = 15 / 5 = 3

Answer

If all painters work at the same productivity level, it will take 3 days for the job to be completed when two additional painters are added.

Note: The answer provided above is based on the assumption that all painters work at the same productivity level. If there are any variations in the productivity levels of the painters, the time required to complete the job may differ.