Question

три дворника убирают площадку за 15 минут. за сколько СЕКУНД могут убрать эту же площадку 5 дворников? ​

Answer 1

Ответ: 540 секунд = 9мин

Пошаговое объяснение: (15мин×3дворника) = 45 минут для 1го дворника. (45минут : 5дворников) = 9 минут для 5ых дворников. 9×60сек = 540 секунд.

Answer 2

Calculation

To calculate the time it takes for 5 janitors to clean the same area, we can use the concept of proportionality. We know that 3 janitors can clean the area in 15 minutes. Let's set up a proportion:

3 janitors take 15 minutes to clean the area 5 janitors will take x minutes to clean the area

The proportion can be written as:

3/15 = 5/x

To solve for x, we can cross-multiply:

3x = 5 * 15

Now, let's calculate the value of x:

3x = 75 x = 75/3 x = 25

Therefore, it would take 5 janitors 25 minutes to clean the same area.

Answer

5 janitors can clean the same area in 25 minutes.