Question

Автомобиль первую часть пути прошел за 2,8 ч,а вторую - за 1,2 ч.Во сколько раз меньше времени израсходовано на вторую часть пути,чем на первую?Сколько процентов всего времени движения затрачено на первую часть пути?

Answer 1

1) 2,8 : 1,2 = 2 1/3 (раза) в 2 1/3 раза меньше времени израсходовано на вторую часть пути,чем на первую
2) 2,8 + 1,2 = 4(ч) затрачено на весь путь
3) 2,8 : 4 *100 = 70(%) первая часть пути
4) 1,2 : 4 * 100 = 30(%) вторая часть пути

Answer 2

Calculation of Time Difference and Percentage of Total Time

To find the time difference between the first and second parts of the journey, we need to subtract the time taken for the second part from the time taken for the first part.

Let's denote the time taken for the first part as t1 (2.8 hours) and the time taken for the second part as t2 (1.2 hours).

The time difference between the two parts can be calculated as follows:

Time difference = t1 - t2

Substituting the given values:

Time difference = 2.8 - 1.2 = 1.6 hours

To find the ratio of the time taken for the second part to the time taken for the first part, we can divide the time taken for the second part by the time taken for the first part:

Ratio = t2 / t1

Substituting the given values:

Ratio = 1.2 / 2.8 ≈ 0.4286

To find the percentage of the total time spent on the first part of the journey, we can divide the time taken for the first part by the sum of the times taken for both parts and multiply by 100:

Percentage = (t1 / (t1 + t2)) * 100

Substituting the given values:

Percentage = (2.8 / (2.8 + 1.2)) * 100 ≈ 70.0%

Therefore, the time spent on the second part of the journey is approximately 1.6 hours less than the time spent on the first part, and approximately 70.0% of the total time was spent on the first part.

Please note that the given question does not provide any specific units for time, so we have assumed hours for the calculations.

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