Question

Страус бежал 30с со скоростью 20м/с. Оставшуюся часть пути он пробежал со скоростью 23м/с. на весь путь он затратил 40с. Какое расстояние пробежал страус?

Answer 1

20*30=60 600+812=1412 .растояния пробежал страус

Answer 2

1)40-30=10(с.)- бежал страус со скоростью 23м/с; 2) 30×20=600(м)- пробежал страус за 30 секунд 3) 10×23=230(м)- пробежал страус за 10 секунд 4) 230+600=830(м)- пробежал страус. Ответ: 830 метров

Answer 3

Problem Analysis

We are given that an ostrich ran for 30 seconds with a speed of 20 m/s, and then ran the remaining part of the distance with a speed of 23 m/s. The ostrich took a total of 40 seconds to complete the entire distance. We need to find the distance the ostrich ran.

Solution

Let's assume that the ostrich ran a distance of x meters in the first 30 seconds with a speed of 20 m/s. Therefore, the time taken to cover this distance can be calculated using the formula: time = distance / speed. So, we have:

30 = x / 20

Simplifying this equation, we find that x = 600 meters.

Now, let's assume that the remaining distance the ostrich ran with a speed of 23 m/s is y meters. The time taken to cover this distance can be calculated using the same formula:

40 - 30 = y / 23

Simplifying this equation, we find that y = 260 meters.

Therefore, the total distance the ostrich ran is the sum of the distances covered in the first 30 seconds and the remaining time:

Total distance = x + y = 600 + 260 = 860 meters.

So, the ostrich ran a distance of 860 meters.

Answer

The ostrich ran a distance of 860 meters.

Verification

To verify the answer, we can check if the time taken to cover the total distance matches the given information. The ostrich ran the first part of the distance with a speed of 20 m/s for 30 seconds, covering 600 meters. Then, it ran the remaining distance with a speed of 23 m/s for 10 seconds, covering 260 meters. The total time taken is 30 + 10 = 40 seconds, which matches the given information. Therefore, the answer is correct.

References

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