Question

Установка двух счётчиков воды холодной и горячей стоит 3700.До установки счётчиков Александр платил за водоснабжение ежемесячно 1100 руб.после установки счётчиков оказалось,что в среднем за месяц он расходует воды на 500 руб.За сколько месяцев установка счётчиков окупится?

Answer 1

1) 1100 - 500 = 600 (рубл.) - экономия
2) 600*7=4200 (рубл) 
Ответ: за 7 месяцев установка счетчика окупится

Вроде так :)

Answer 2

Calculation of Payback Period for Water Meter Installation

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

According to the information provided, the cost of installing the water meters is 3700 rubles. Before the installation, Alexander used to pay 1100 rubles per month for water supply. However, after the installation, it was discovered that he consumes an average of 500 rubles worth of water per month.

To calculate the payback period, we need to determine how many months it will take for the savings in water expenses to cover the initial installation cost of 3700 rubles.

Step 1: Calculate Monthly Savings The monthly savings in water expenses can be calculated by subtracting the post-installation water consumption (500 rubles) from the pre-installation water expenses (1100 rubles): Monthly savings = Pre-installation water expenses - Post-installation water consumption Monthly savings = 1100 rubles - 500 rubles Monthly savings = 600 rubles

Step 2: Calculate Payback Period The payback period is the time it takes for the savings to cover the initial installation cost. It can be calculated by dividing the installation cost by the monthly savings: Payback period = Installation cost / Monthly savings Payback period = 3700 rubles / 600 rubles Payback period ≈ 6.17 months

Therefore, it will take approximately 6.17 months for the installation of the water meters to pay for itself.

Please note that the calculation provided is based on the information provided and assumes that the monthly savings in water expenses remain constant over time. Additionally, other factors such as maintenance costs or changes in water tariffs are not considered in this calculation.

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