Question

8. Первый кран наполняет бассейн за 20 минут, а второй – за 35 минут. Они вместе наполняли бассейн в течение 5 минут, затем первый кран закрыли. За сколько минут второй кран заполнит оставшуюся часть бассейна?​

Answer 1

Ответ:
За 30 мин.
Пошаговое объяснение:
35-5=30
Все просто

Answer 2

Problem Analysis

We have two taps, the first one fills the pool in 20 minutes, and the second one fills the pool in 35 minutes. They both filled the pool together for 5 minutes, after which the first tap was closed. We need to determine how long it will take for the second tap to fill the remaining part of the pool.

Solution

To solve this problem, we can calculate the rate at which each tap fills the pool and then use that information to find the time it takes for the second tap to fill the remaining part of the pool.

Let's assume the total capacity of the pool is C.

The rate at which the first tap fills the pool is 1/20 of the pool per minute, and the rate at which the second tap fills the pool is 1/35 of the pool per minute.

Together, when both taps are open, they fill the pool at a rate of 1/20 + 1/35 of the pool per minute.

During the 5 minutes when both taps were open, they filled 5 * (1/20 + 1/35) of the pool.

After closing the first tap, the second tap needs to fill the remaining part of the pool, which is C - 5 * (1/20 + 1/35).

To find the time it takes for the second tap to fill the remaining part of the pool, we can divide the remaining part of the pool by the rate at which the second tap fills the pool.

Let's calculate the time it takes for the second tap to fill the remaining part of the pool:

Time = (C - 5 * (1/20 + 1/35)) / (1/35)

Now, let's substitute the values and calculate the time:

Time = (C - 5 * (1/20 + 1/35)) / (1/35)

Calculation

To calculate the time it takes for the second tap to fill the remaining part of the pool, we need to know the total capacity of the pool (C). Unfortunately, the total capacity of the pool is not provided in the question. Therefore, we cannot provide a specific numerical answer.

However, if you provide the total capacity of the pool, we can calculate the time using the formula mentioned above.

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