Question

3.Определите вид зависимости величин и решите задачу с помощью составления пропорции.Изготавливая по 42 детали в час, рабочий трудился 8 часов. Сколько времениему понадобилось бы на эту же работу, если бы он делал в час по 48 деталей? Токо попробуйте сделать без пропорции зарежу нах и удалю ответ​

Answer 1

Ответ:

7 часов

Пошаговое объяснение:

Если 42 в час то 8 часов

если 48 в час то  х часов. Обратная пропорциональность ( делает больше , времени тратит меньше)

42:48=х:8

48х=42*8

х=(42*8):48

х=7 часов

Answer 2

Problem Analysis

To solve this problem, we need to determine the relationship between the number of parts produced and the time taken to produce them. We are given that the worker produces 42 parts in 8 hours. We need to find out how long it would take the worker to produce the same number of parts if they were producing 48 parts per hour.

Solution

Let's assume that the time required to produce the parts is T hours. We can set up a proportion to solve the problem:

42 parts / 8 hours = 48 parts / T hours

To solve for T, we can cross-multiply and solve for T:

42T = 8 * 48

T = (8 * 48) / 42

Now we can calculate the value of T.

Calculation

Let's calculate the value of T:

T = (8 * 48) / 42

T = 384 / 42

T ≈ 9.14 hours

Therefore, it would take the worker approximately 9.14 hours to produce the same number of parts if they were producing 48 parts per hour.

Answer

The worker would need approximately 9.14 hours to complete the same amount of work if they were producing 48 parts per hour.

Please let me know if you need any further assistance.