Question

1. На лодочной станции надо Покрасить 168 лодок. Один мастер Может ВЫПОЛНИТЬ эту работу за 28 дней, а другой за 21 день. За СКОЛЬКО дней Они могут ВЫПОЛНИТЬ эту работу, работая вместе? с написанными условиями​

Answer 1

Ответ:

Пошаговое объяснение:

Вс-168 лодок

Мастер-за 28 дней

Мастер 2 -за 21 день

1)168:28=6

2)168:21=8

3)8+6=14 дней работая вместе

Ответ:Вместе они зделают эту работу за 14 дней

Answer 2

Problem Analysis

We have two masters who can complete the task of painting 168 boats. One master can complete the task in 28 days, while the other can complete it in 21 days. We need to determine how many days it will take for them to complete the task if they work together.

Solution

To solve this problem, we can use the concept of work rates. The work rate of a person is defined as the amount of work they can complete in a unit of time. In this case, we can calculate the work rate of each master as follows:

- Master 1: 1 boat per 28 days - Master 2: 1 boat per 21 days

To find the combined work rate of both masters, we can add their individual work rates:

- Combined work rate = Work rate of Master 1 + Work rate of Master 2

Now, we can calculate the number of days it will take for both masters to complete the task by dividing the total work (168 boats) by their combined work rate:

- Number of days = Total work / Combined work rate

Let's calculate the solution:

Calculation

The work rate of Master 1 is 1 boat per 28 days, and the work rate of Master 2 is 1 boat per 21 days. Therefore, their combined work rate is:

- Combined work rate = 1/28 + 1/21 = 7/196 + 8/196 = 15/196

Now, we can calculate the number of days it will take for both masters to complete the task:

- Number of days = 168 boats / (15/196 boats per day) = 168 * (196/15) days

Answer

Therefore, it will take both masters approximately 218.4 days to complete the task if they work together.

Please note that the calculated value is an approximation, and the actual number of days may vary slightly.

Let me know if there's anything else I can help you with!