Question

ДАЮ 30 БАЛЛОВ, СРОЧНО, УМОЛЯЮ!!!!!! Установка двух счётчиков воды стоит 3300 рублей. До установки счетчиков Александр платил за воду ежемесячно 800 рублей. После установки счетчиков оказалось, что в среднем он расходует воды на 300 рублей при тех же тарифах на воду. За какое наименьшее количество месяцев при тех же тарифах на воду установка счетчиков окупится?

Answer 1

Решение:

Установка счетчиков позволяет ежемесячно экономить 300 руб. Значит, они окупятся через 3300 : 300 = 11 месяцев.

Ответ: 11.

Answer 2

Calculation of Payback Period for Water Meter Installation

To calculate the payback period for the installation of two water meters, we need to consider the initial cost of installation and the monthly savings in water expenses.

According to the information provided, the installation of two water meters costs 3300 rubles. Before the installation, Alexander used to pay 800 rubles per month for water. After the installation, it was found that he consumes water worth 300 rubles on average per month, with the same water tariffs.

To calculate the payback period, we need to determine the monthly savings in water expenses after the installation. This can be calculated by subtracting the average monthly water consumption after installation from the monthly water expenses before installation:

Monthly savings = Monthly expenses before installation - Average monthly consumption after installation Monthly savings = 800 rubles - 300 rubles = 500 rubles

Now, we can calculate the payback period by dividing the installation cost by the monthly savings:

Payback period = Installation cost / Monthly savings Payback period = 3300 rubles / 500 rubles = 6.6 months

Therefore, the installation of the water meters will pay for itself in approximately 6.6 months, assuming the same water tariffs and consumption patterns.

Please note that the payback period calculation does not take into account any other factors such as maintenance costs or potential changes in water tariffs over time.