Question

Открыли кран,из которого за 1 мин выливается 20л,и за 8 минут наполнили ванну.Потом кран закрыли и открыли слив,через который вода вытекла за 4 мин.Сколько литров воды вытекало за 1 мин

Answer 1

1) 20*8=160(литров)- Потребовалось на наполнение ванной
2)160/4=40(литров) - Вытекло за 1-у минуту

Answer 2

8*20=160  л объем ванной
160/4=40 л вытекает за минуту

Answer 3

Problem Analysis

We are given the following information: - A faucet pours out 20 liters of water in 1 minute. - The bathtub was filled in 8 minutes. - The drain was opened and the water flowed out in 4 minutes.

We need to determine how many liters of water flowed out per minute through the drain.

Solution

To solve this problem, we can use the concept of rates. We know that the faucet pours out 20 liters of water in 1 minute. Let's assume that the rate at which water flows out of the drain is x liters per minute.

When the faucet is open for 8 minutes, it fills the bathtub. So, the total amount of water poured into the bathtub is 20 liters/minute * 8 minutes = 160 liters.

When the drain is open for 4 minutes, the water flows out. So, the total amount of water that flowed out is x liters/minute * 4 minutes = 4x liters.

Since the amount of water poured into the bathtub is equal to the amount of water that flowed out, we can set up the following equation:

160 liters = 4x liters

To find the value of x, we can solve this equation.

Calculation

Let's solve the equation to find the value of x:

160 liters = 4x liters

Dividing both sides of the equation by 4, we get:

40 liters = x liters

Therefore, the rate at which water flows out of the drain is 40 liters per minute.

Answer

The amount of water that flowed out through the drain per minute is 40 liters.

Explanation

When the faucet is open for 8 minutes, it pours 20 liters of water per minute, resulting in a total of 160 liters of water poured into the bathtub. When the drain is open for 4 minutes, the water flows out at a rate of 40 liters per minute, resulting in a total of 160 liters of water flowing out. Therefore, the amount of water that flowed out through the drain per minute is 40 liters.