Question

Стоимость мыла-17 рублей.В день распродажи цену мыла снизили на 10%.Цена мыла на распродаже была на 20% выше себестоимости.Какова себестоимость мыла в рублях?

Answer 1

17 рублей - 100%
 х рублей- 80%
составляем пропорцию
17/x = 100/80
80*17=100x
1360=100x
x=13,6 рубля( цена во время распродажи)
Теперь составляем новую пропорцию относительно себестоимости
120%= 13,6
100%= x
120/100=13,6/x
120x=13,6*100
120x= 1360
x = 11 рублей( ответ примерный, так как на цело не делится)

Answer 2

Calculation of the Cost Price of Soap

To calculate the cost price of the soap, we need to consider the given information:

- The original price of the soap is 17 rubles. - On the day of the sale, the price of the soap was reduced by 10%. - The price of the soap on sale was 20% higher than the cost price.

Let's break down the calculation step by step:

1. Calculate the sale price of the soap: - The original price of the soap is 17 rubles. - The price was reduced by 10%, which means the sale price is 90% of the original price. - Sale price = 17 rubles * 0.9 = 15.3 rubles. 2. Calculate the cost price of the soap: - The sale price of the soap was 20% higher than the cost price. - Let's assume the cost price of the soap is x rubles. - The sale price of the soap is 120% (100% + 20%) of the cost price. - 120% of the cost price = 15.3 rubles. - 1.2x = 15.3 rubles. - Solving for x, we get: - x = 15.3 rubles / 1.2 = 12.75 rubles. Therefore, the cost price of the soap is 12.75 rubles.