Question

Хозяйка купила 2л молока и 700 г творога. Сколько стоит вся покупка, если цена 1 л молока ниже цены 1 кг творога на 60%

Answer 1

пусть 1 кг творога стоит А, тогда,
1 л молока - 0,4А,
общая цена будет 2*0,4*А + 0,7*А = 0,8А + 0,7А = 1,5А

Answer 2

Calculation of the Total Cost

To calculate the total cost of the purchase, we need to determine the prices of 1 liter of milk and 1 kilogram of cottage cheese. The price of 1 liter of milk is lower than the price of 1 kilogram of cottage cheese by 60%.

Let's assume the price of 1 kilogram of cottage cheese is X. Since the price of 1 liter of milk is 60% lower than the price of 1 kilogram of cottage cheese, the price of 1 liter of milk can be calculated as 0.4X (100% - 60% = 40% = 0.4).

Now, let's calculate the total cost of the purchase:

- The owner bought 2 liters of milk, which would cost 2 * 0.4X = 0.8X. - The owner also bought 700 grams of cottage cheese, which is equal to 0.7 kilograms. This would cost 0.7 * X = 0.7X.

Therefore, the total cost of the purchase would be 0.8X + 0.7X = 1.5X.

Answer

The total cost of the purchase, considering the given prices, would be 1.5X.