Question

Помогите решить задачу:после повышения цены на помидоры на 15 р. за килограмм они стали стоить 45 р. за килограмм.Сколько килограммов помидоров можно было купить на 90 р. до подорожания и сколько - после повышения цены?

Answer 1

1)45-15=30(руб)-цена 1 кг помидоры
2)90:30=3(кг)-можно было купить до подорожания
3)90:45=2(кг)-можно купить после повышения цены
Ответ: 3 кг до подорожания и 2 кг после

Answer 2

Problem Analysis

To solve this problem, we need to determine the quantity of tomatoes that could be purchased before and after the price increase. We are given that the price of tomatoes increased by 15 rubles per kilogram and that they now cost 45 rubles per kilogram. We also need to find out how many kilograms of tomatoes could be purchased for 90 rubles before the price increase.

Solution

Let's start by finding the quantity of tomatoes that could be purchased for 90 rubles before the price increase. To do this, we need to divide the amount of money (90 rubles) by the initial price per kilogram.

Step 1: Calculate the initial price per kilogram of tomatoes. The initial price per kilogram of tomatoes can be found by subtracting the price increase from the current price per kilogram. Initial price per kilogram = Current price per kilogram - Price increase Initial price per kilogram = 45 rubles per kilogram - 15 rubles per kilogram Initial price per kilogram = 30 rubles per kilogram

Step 2: Calculate the quantity of tomatoes that could be purchased for 90 rubles before the price increase. The quantity of tomatoes can be found by dividing the amount of money (90 rubles) by the initial price per kilogram. Quantity of tomatoes before the price increase = Amount of money / Initial price per kilogram Quantity of tomatoes before the price increase = 90 rubles / 30 rubles per kilogram Quantity of tomatoes before the price increase = 3 kilograms

Therefore, before the price increase, it was possible to buy 3 kilograms of tomatoes for 90 rubles.

Step 3: Calculate the quantity of tomatoes that can be purchased after the price increase. The current price per kilogram of tomatoes is given as 45 rubles per kilogram. To find the quantity of tomatoes that can be purchased for 90 rubles after the price increase, we need to divide the amount of money (90 rubles) by the current price per kilogram. Quantity of tomatoes after the price increase = Amount of money / Current price per kilogram Quantity of tomatoes after the price increase = 90 rubles / 45 rubles per kilogram Quantity of tomatoes after the price increase = 2 kilograms

Therefore, after the price increase, it is possible to buy 2 kilograms of tomatoes for 90 rubles.

Answer

- Before the price increase, it was possible to buy 3 kilograms of tomatoes for 90 rubles. - After the price increase, it is possible to buy 2 kilograms of tomatoes for 90 rubles.

Please let me know if you need any further assistance!