Question

Бассейн наполнялся через две трубы первая труба наполняет за 12 часов,а вторая за 3/4 этого времени. за сколько они наполнят бассейн вместе​

Answer 1

Ответ:

12:4=3

3*3=9(ч)-заполняет бассейн 2 труба

1-это бассейн

1:12=1/12 часть бассейна наполняется за час первой трубой

1:9=1/9 часть бассейна наполняется за час второй трубой

1/12+1/9=7/36 часть бассейна наполняется двумя трубами

1:7/36=1*36/7=за 4 часа 20 минут бассейн заполнится двумя трубами

Answer 2

Filling the Pool with Two Pipes

To find out how long it will take to fill the pool when two pipes are used, we need to consider the rates at which each pipe fills the pool.

Let's assume that the pool has a capacity of 1 unit (you can think of it as 1 liter, 1 gallon, or any other unit of volume).

The first pipe fills the pool in 12 hours. This means that the rate at which the first pipe fills the pool is 1/12 units per hour.

The second pipe fills the pool in 3/4 of the time it takes the first pipe. So, the second pipe fills the pool in (3/4) * 12 = 9 hours. This means that the rate at which the second pipe fills the pool is 1/9 units per hour.

To find out how long it will take to fill the pool when both pipes are used together, we need to add up the rates at which each pipe fills the pool.

The combined rate at which both pipes fill the pool is (1/12 + 1/9) units per hour.

To find out how long it will take to fill the pool, we can take the reciprocal of the combined rate:

Time to fill the pool = 1 / (1/12 + 1/9) hours

Now, let's calculate the time it will take to fill the pool when both pipes are used together.

Time to fill the pool = 1 / (1/12 + 1/9) hours

To simplify the calculation, we can find a common denominator for 12 and 9, which is 36.

Time to fill the pool = 1 / (3/36 + 4/36) hours

Time to fill the pool = 1 / (7/36) hours

To divide by a fraction, we can multiply by its reciprocal.

Time to fill the pool = 1 * (36/7) hours

Time to fill the pool = 36/7 hours

Therefore, it will take approximately 5.14 hours to fill the pool when both pipes are used together.

Please note that the above calculation assumes that the rates at which the pipes fill the pool remain constant throughout the filling process.