Question

Из бочки взяли 25 л воды и дважды по 18 л воды,затем долили 30 л ,после чего в бочке стало 143 л воды.сколько литров воды было в бочке первоначально？

Answer 1

1) 143-30=113 л
2) 18×2= 36 л
3) 36+25=61 л
4)113-61=52 л
Ответ : в бочке было 52 литра

Answer 2

143-30+18+18+25=174 (л)

Ответ: 174 л

(Рассуждаем в обратном порядке: (Если в конце долили 30 л, то мы их вычитаем, а те литры, которые из бочки забирали, мы прибавили)

Можно и уравнением решить:

х-25-18-18+30=143

х-31=143

х=174

Answer 3

Calculation of Initial Water Volume in the Barrel

To calculate the initial volume of water in the barrel, we need to consider the information provided step by step.

1. 25 liters of water were taken from the barrel. - This means that the initial volume of water in the barrel was at least 25 liters.

2. Twice, 18 liters of water were taken from the barrel. - This means that an additional 36 liters (2 * 18 liters) of water were taken from the barrel. - Therefore, the total amount of water taken from the barrel is 25 liters + 36 liters = 61 liters.

3. 30 liters of water were poured into the barrel. - This means that 30 liters of water were added to the barrel.

4. After pouring 30 liters of water, the total volume in the barrel became 143 liters. - This means that the final volume of water in the barrel is 143 liters.

To find the initial volume of water in the barrel, we need to subtract the total amount of water taken from the barrel (61 liters) and the amount of water poured into the barrel (30 liters) from the final volume of water in the barrel (143 liters).

Initial volume of water in the barrel = Final volume - Total amount taken - Amount poured Initial volume of water in the barrel = 143 liters - 61 liters - 30 liters Initial volume of water in the barrel = 52 liters

Therefore, the initial volume of water in the barrel was 52 liters.

Please note that the information provided is based on the given context and calculations.