Question

3. Первая бригада может отремонтировать дорогу за 10 дней, вторая -за 15 дней, а третья - за 10 дней. За сколько дней могут отремонтировать дорогу три бригаде paбoтaя вместе ? Срочно скоро урок пжАаааааааааааааааааааааааааааааааапппааа

Answer 1

Ответ:

вроде 35

Пошаговое объяснение:

10+15+10=35дней

Answer 2

Problem Analysis

We are given three brigades that can repair a road in different time frames. The first brigade can complete the repair in 10 days, the second brigade in 15 days, and the third brigade in 10 days. We need to determine how many days it will take for all three brigades to repair the road together.

Solution

To find the number of days it will take for all three brigades to repair the road together, we can use the concept of work rates. The work rate is the amount of work done per unit of time.

Let's assume that the total work required to repair the road is 1 unit.

The work rate of the first brigade is 1/10 units per day, as they can complete the work in 10 days. The work rate of the second brigade is 1/15 units per day, as they can complete the work in 15 days. The work rate of the third brigade is 1/10 units per day, as they can complete the work in 10 days.

To find the combined work rate of all three brigades, we can add their individual work rates:

Combined work rate = 1/10 + 1/15 + 1/10 = 3/30 + 2/30 + 3/30 = 8/30 units per day.

Now, we can find the number of days it will take for all three brigades to complete the work by dividing the total work (1 unit) by the combined work rate (8/30 units per day):

Number of days = 1 / (8/30) = 30/8 = 3.75 days.

Therefore, it will take all three brigades working together approximately 3.75 days to repair the road.

Answer

Working together, the three brigades can repair the road in approximately 3.75 days.

[Source 1](https://www.example.com)