Question

Два крана, работая вместе, наполняют резервуар за 0,25 часа. Если бы первый кран работал один, то 2 наполнение резервуара заняло бы часа. Сколько времени понадобится для заполнения резервуара 3 через второй кран? Верных ответов: 3 1440 секунд ту 0,5 часов 2 часа 24 минуты с | 1800 секунд​

Answer 1

Ответ:

2/5 часа

Пошаговое объяснение:

Answer 2

Problem Analysis

We are given that two taps can fill a reservoir in 0.25 hours, and we need to find the time it takes to fill the reservoir using only the second tap.

Solution

Let's assume that the first tap can fill the reservoir in x hours. We are given that if the first tap worked alone, it would take 2 hours to fill the reservoir. Therefore, we can set up the following equation:

1/x + 1/2 = 1/0.25

To solve this equation, we can multiply both sides by the least common multiple (LCM) of the denominators, which is 4x:

4 + 2x = 16

Simplifying the equation, we get:

2x = 12

x = 6

Therefore, the first tap can fill the reservoir in 6 hours.

Now, we need to find the time it takes to fill the reservoir using only the second tap. We are given that the first tap can fill the reservoir in 6 hours, and together they can fill it in 0.25 hours. Therefore, the second tap can fill the reservoir in:

0.25 - 6 = -5.75 hours

However, negative time does not make sense in this context. Therefore, we can conclude that it is not possible to fill the reservoir using only the second tap.

Answer

It is not possible to fill the reservoir using only the second tap.

Please let me know if I can help you with anything else.