Question

В бочку с водой проведён шланг,через который в неё вливается 9 вёдер воды в час.Через другой шланг водой из бочки поливают огород,расходуя при этом 16 вёдер воды в час.через сколько времени опусташится полная бочка,вмещающая 21 ведро воды.если оба шланга начнут использоваться одновременно?

Answer 1

1)16+9=25(в)- в час.
Ответ. 25/21. Вот так.

Answer 2

16-9=7 ведер в час расход
21/7=отве

Answer 3

Problem Analysis

We are given a scenario where water is being poured into a barrel at a rate of 9 buckets per hour through one hose, while another hose is being used to water a garden at a rate of 16 buckets per hour. We need to determine how long it will take for the full barrel, which can hold 21 buckets of water, to be emptied if both hoses are used simultaneously.

Solution

To solve this problem, we need to calculate the net rate at which water is being poured into the barrel and subtract the rate at which water is being used to water the garden. The remaining rate will determine how long it takes to empty the barrel.

Let's calculate the net rate of water being poured into the barrel: - Rate of water being poured into the barrel = 9 buckets per hour

Now, let's calculate the rate at which water is being used to water the garden: - Rate of water being used to water the garden = 16 buckets per hour

To determine the time it takes to empty the barrel, we need to find the difference between the rate of water being poured into the barrel and the rate of water being used to water the garden: - Net rate = Rate of water being poured into the barrel - Rate of water being used to water the garden - Net rate = 9 buckets per hour - 16 buckets per hour - Net rate = -7 buckets per hour

Since the net rate is negative, it means that the water is being emptied from the barrel at a rate of 7 buckets per hour.

To calculate the time it takes to empty the full barrel, we can divide the total capacity of the barrel by the net rate: - Time = Total capacity of the barrel / Net rate - Time = 21 buckets / 7 buckets per hour - Time = 3 hours

Therefore, if both hoses are used simultaneously, it will take 3 hours to empty the full barrel.

Answer

If both hoses are used simultaneously, it will take 3 hours to empty the full barrel, which can hold 21 buckets of water.