Question

В январе за горячую воду Петя заплатил 800 рублей. В феврало цена за литр увеличилась на 20%, а литров Петя потратил меньше на 30%.Сколько рублей заплатил Петя за февраль?​

Answer 1

Ответ:

672

Пошаговое объяснение:

800:100*20=160 увеличилось за февраль

800+7 60=960 р за февраль

960:100*70=672рубля

Answer 2

Calculation of the Amount Paid by Petya for February

To calculate the amount Petya paid for hot water in February, we need to consider the increase in the price per liter and the decrease in the amount of water consumed.

Let's break down the information given:

- In January, Petya paid 800 rubles for hot water. - In February, the price per liter increased by 20%. - Petya consumed 30% less water in February.

To calculate the amount paid by Petya for February, we'll follow these steps:

1. Calculate the new price per liter after the 20% increase. 2. Calculate the amount of water consumed in February after the 30% decrease. 3. Multiply the new price per liter by the amount of water consumed to get the total amount paid by Petya for February.

Let's perform the calculations:

1. Calculate the new price per liter after the 20% increase: - Let's assume the original price per liter in January was x rubles. - After a 20% increase, the new price per liter in February would be 1.2x rubles.

2. Calculate the amount of water consumed in February after the 30% decrease: - Let's assume the amount of water consumed in January was y liters. - After a 30% decrease, the amount of water consumed in February would be 0.7y liters.

3. Multiply the new price per liter by the amount of water consumed to get the total amount paid by Petya for February: - The total amount paid by Petya for February can be calculated as (1.2x rubles/liter) * (0.7y liters).

Unfortunately, the specific values of x and y are not provided in the question, so we cannot calculate the exact amount paid by Petya for February. However, you can substitute the appropriate values for x and y into the formula to calculate the answer.

Please provide the values of x (the original price per liter in January) and y (the amount of water consumed in January) so that we can calculate the amount paid by Petya for February.