Question

Із бочки відлили спочатку 0,5, а потім – 0,3 всієї води, після чого в ній залишилося 60 літрів. Скільки води було в бочці?

Answer 1

60л-70%
х(л)-100%
(60л•100%):70%=85,7(л)
85,7л-50%
х(л)-100%
х=(85,7л•100%):50%=171,4(л)

Answer 2

Calculating the Amount of Water in the Barrel

To calculate the amount of water in the barrel, we can use the information provided in the question.

First, 0.5 of the water was poured out, and then 0.3 of the remaining water was poured out. After this, 60 liters of water were left in the barrel.

Let's denote the initial amount of water in the barrel as W.

1. Pouring out 0.5 of the water: - After pouring out 0.5 of the water, the remaining amount of water is: W - 0.5W = 0.5W.

2. Pouring out 0.3 of the remaining water: - After pouring out 0.3 of the remaining water, the amount of water left is: 0.5W - 0.3(0.5W) = 0.5W - 0.15W = 0.35W.

3. Given amount of water left: - It is mentioned that 60 liters of water were left in the barrel, so we have: 0.35W = 60.

Calculating the Amount of Water

To find the initial amount of water in the barrel, we can solve for W using the given information.

W = 60 / 0.35

Using the above formula, we can calculate the initial amount of water in the barrel.

Calculation:

- W = 60 / 0.35 - W ≈ 171.43 liters

Therefore, the initial amount of water in the barrel was approximately 171.43 liters.

Answer 3

Спочатку в бочці було 0,5 * 60 = 30 літрів води. Потім з бочки відлили 0,3 * 60 = 18 літрів води. Отже, до відливу в бочці було 30 + 18 = 48 літрів води.