Question

в первый день вмагазине было продано30 процентов всего картофеля во фторой день40 процентов оставшегося картофеля в 3 день последнии 84 кг.сколько кг было первоначально

Answer 1

84кг - 60 процентов. (84\60*100)

140 кг продавалось за последние 2 дня.

140 кг - 70 процентов.

Изначально продавалоьс 200 кг.

Answer 2

было картофеля х

продали в первый день 0,3х

продали во второй день (х-0,3х)*0,4= 0,28х

продали в третий день 84 кг

составим уравнение

х=0,3х+0,28х+84 

х- 0,58х=84

 0,42=84

х=84:0,42

х= 200 кг было всего картофеля

200*0,3= 60 т продали в первый день

(200-60)*0,4= 56 т продали в второй день

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Answer 3

Problem Analysis

We are given the following information: - On the first day, 30% of the total amount of potatoes was sold. - On the second day, 40% of the remaining potatoes was sold. - On the third day, the remaining weight of potatoes was 84 kg.

We need to determine the initial weight of potatoes.

Solution

Let's assume the initial weight of potatoes is x kg.

On the first day, 30% of the total weight of potatoes was sold, which is 0.3x kg.

After the first day, the remaining weight of potatoes is x - 0.3x = 0.7x kg.

On the second day, 40% of the remaining weight of potatoes was sold, which is 0.4 * 0.7x = 0.28x kg.

After the second day, the remaining weight of potatoes is 0.7x - 0.28x = 0.42x kg.

On the third day, the remaining weight of potatoes is given as 84 kg.

Therefore, we can set up the equation:

0.42x = 84

To find the value of x, we can solve this equation:

x = 84 / 0.42

Let's calculate the value of x.

Calculation

x = 84 / 0.42 = 200

Answer

The initial weight of potatoes was 200 kg.