Question

За 600 г масла и 1,4 кг творога заплатили 103 р 80 к .Какова цена 1 кг творога, если 1 кг масла стоит. 75 р

Answer 1

600г=0,6кг
0,6*75=45(руб) - стоимость 600г масла
103,8-45=58,8(руб) - стоимость 1,4кг творога
58,8:1,4=42(руб) - цена творога

Answer 2

Problem Analysis

To find the price of 1 kg of cottage cheese, we need to determine the cost of 1 kg of oil and the total cost of 1.4 kg of cottage cheese and 600 g of oil. We are given that the cost of 1 kg of oil is 75 rubles and the total cost of 600 g of oil and 1.4 kg of cottage cheese is 103 rubles and 80 kopecks.

Solution

Let's calculate the cost of 600 g of oil and 1.4 kg of cottage cheese separately and then find the price of 1 kg of cottage cheese.

1. Cost of 600 g of oil: - We know that the cost of 1 kg of oil is 75 rubles. - To find the cost of 600 g of oil, we can use the proportion: 1 kg of oil costs 75 rubles, so 600 g of oil will cost (600/1000) * 75 rubles. - Calculating this, we get: (600/1000) * 75 = 45 rubles.

2. Cost of 1.4 kg of cottage cheese: - We are given that the total cost of 600 g of oil and 1.4 kg of cottage cheese is 103 rubles and 80 kopecks. - We already calculated the cost of 600 g of oil as 45 rubles. - To find the cost of 1.4 kg of cottage cheese, we can subtract the cost of 600 g of oil from the total cost. - Calculating this, we get: 103 rubles and 80 kopecks - 45 rubles = 58 rubles and 80 kopecks.

3. Price of 1 kg of cottage cheese: - We know that the cost of 1.4 kg of cottage cheese is 58 rubles and 80 kopecks. - To find the price of 1 kg of cottage cheese, we can use the proportion: 1.4 kg of cottage cheese costs 58 rubles and 80 kopecks, so 1 kg of cottage cheese will cost (1/1.4) * (58 rubles and 80 kopecks). - Calculating this, we get: (1/1.4) * (58 rubles and 80 kopecks) = 41 rubles and 71 kopecks.

Answer

The price of 1 kg of cottage cheese is 41 rubles and 71 kopecks.