Question

Дима и Алена - студенты, думают о покупке стиральной машины. Стирка в прачечной стоит 100 рублей за 8 кг одежды. Ребята стирают 8 кг одежды раз в две недели. За какой срок окупится стиральная машина за 8 тыс. рублей? (Срок нужно записать в неделях)

Answer 1

Стиральная машинка окупит ской срок через 160 недель

Answer 2

Calculation of the Payback Period for the Washing Machine

To calculate the payback period for the washing machine, we need to compare the cost of using a laundromat to the cost of owning and operating a washing machine.

According to the information provided, the cost of washing 8 kg of laundry at the laundromat is 100 rubles. The students wash 8 kg of laundry every two weeks.

To calculate the payback period, we need to determine how many times the students will need to use the laundromat before the cost of the washing machine is recovered.

Let's break down the calculation step by step:

1. Calculate the cost of using the laundromat for one year: - The students wash their laundry every two weeks, which means they use the laundromat 26 times a year (52 weeks in a year divided by 2). - The cost of using the laundromat for one year is 26 times the cost per wash, which is 100 rubles per wash. - Therefore, the cost of using the laundromat for one year is 26 * 100 = 2600 rubles.

2. Calculate the number of years it will take to recover the cost of the washing machine: - The cost of the washing machine is given as 8000 rubles. - To calculate the payback period, we divide the cost of the washing machine by the annual cost of using the laundromat. - Payback period = Cost of washing machine / Annual cost of using the laundromat - Payback period = 8000 / 2600 = 3.08 years.

Therefore, it will take approximately 3.08 years for the students to recover the cost of the washing machine.

Please note that this calculation assumes that the cost of using the laundromat and the frequency of laundry remain constant over time. Additionally, other factors such as maintenance costs, water, and electricity expenses for the washing machine are not considered in this calculation.