Question

Двое очистили 400 штук картофеля ; один чищал 3 штуки в минуту другой 2 Второй работал на 25 минут больше чем первый сколько времени работал каждый решите пж задачу

Answer 1

Х мин. работал первый
х+25 мин. второй
3х+2(х+25)=400
3х+2х+50=400
5х=350
х=70мин.=1ч.10мин. работал первый
70+25=95мин.=1ч.35мин. второй

Answer 2

Problem Analysis

We have two people who cleaned 400 potatoes together. One person cleans 3 potatoes per minute, while the other person cleans 2 potatoes per minute. The second person worked 25 minutes longer than the first person. We need to determine how long each person worked.

Solution

Let's assume the first person worked for x minutes. Since the second person worked 25 minutes longer, the second person worked for (x + 25) minutes.

The total number of potatoes cleaned by the first person is 3 * x, and the total number of potatoes cleaned by the second person is 2 * (x + 25). The sum of these two quantities should be equal to 400.

We can set up the following equation to solve for x:

3x + 2(x + 25) = 400

Now, let's solve this equation to find the values of x and (x + 25).

Calculation

Expanding the equation:

3x + 2x + 50 = 400

Combining like terms:

5x + 50 = 400

Subtracting 50 from both sides:

5x = 350

Dividing both sides by 5:

x = 70

Therefore, the first person worked for 70 minutes, and the second person worked for (70 + 25) = 95 minutes.

Answer

The first person worked for 70 minutes, and the second person worked for 95 minutes.