Question

4. 10 моряков достают якорь за 30 минут. За сколько минут достанут якорь 20 таких моряков? помогите пожалуйста помоготеееее ​

Answer 1

Пошаговое объяснение:

10 моряков = 30 минут

20 моряков = х минут

10/20 = х/30

1/2 = х/30

х = 30*1 / 2

х = 30/2

х = 15

Ответ: за 15 минут

Обратная пропорциональность

Answer 2

Ответ:

за 15 минут. моряков в 2 раза больше, значит время в за которое они достанут в 2 раза меньше

Answer 3

To find out how long it will take 20 sailors to raise an anchor, we can use the concept of proportionality. If 10 sailors can raise the anchor in 30 minutes, we can set up a proportion to find the time it will take for 20 sailors to do the same task.

Let's assume that the time it takes for 20 sailors to raise the anchor is "x" minutes. The proportion can be set up as follows:

10 sailors / 30 minutes = 20 sailors / x minutes

To solve for "x," we can cross-multiply and then solve for "x":

10 * x = 30 * 20

Simplifying the equation:

10x = 600

Dividing both sides by 10:

x = 60

Therefore, it will take 20 sailors 60 minutes to raise the anchor.

Answer: It will take 20 sailors 60 minutes to raise the anchor.