Question

За час через верхний кран в бассейн вливается 25 вёдер воды , а через нижний кран втекает 30 вёдер воды .В бассейне первоначальна было 50 вёдер воды . За какое время бассейн опустеет, если будут открыты оба крана.

Answer 1

Узнаем на сколько становится меньше воды в час. То есть узнаем на сколько больше втекает, чем вытекает: 30-25=5(в)
Дальше узнаем через сколько часов опустеет бассейн:50:5=10(ч)
Все

Answer 2

Около 1 часов:)))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))

Answer 3

Problem Analysis

We have a pool that initially contains 50 buckets of water. Through the upper faucet, 25 buckets of water are poured into the pool every hour, while through the lower faucet, 30 buckets of water flow into the pool every hour. We need to determine how long it will take for the pool to empty if both faucets are open.

Solution

To solve this problem, we need to calculate the net flow of water into the pool every hour. The net flow is the difference between the water poured in through the upper faucet and the water flowing in through the lower faucet.

Let's calculate the net flow of water into the pool every hour:

- Water poured in through the upper faucet: 25 buckets/hour - Water flowing in through the lower faucet: 30 buckets/hour

Net flow of water into the pool every hour = Water poured in through the upper faucet - Water flowing in through the lower faucet

Net flow of water into the pool every hour = 25 buckets/hour - 30 buckets/hour

Net flow of water into the pool every hour = -5 buckets/hour

Since the net flow of water into the pool is negative (-5 buckets/hour), it means that the pool is losing 5 buckets of water every hour. Therefore, the pool will empty completely in 10 hours.

Conclusion

If both the upper and lower faucets are open, the pool will empty completely in 10 hours.