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

2,8/1,2=2цел 1/3 - во столько раз меньше времени израсходовано на вторую часть пути,чем на первую

2,8+1,2=4ч - на весь путь

4 - 100

2,8 - х

 

х=2,8*100/4=70% процентов всего времени движения затрачено на первую часть пути

Answer 2

Problem Analysis

We are given that a car traveled the first part of the journey in 2.8 hours and the second part in 1.2 hours. We need to determine the ratio of the time spent on the second part compared to the first part and the percentage of the total travel time spent on the first part.

Solution

To find the ratio of the time spent on the second part compared to the first part, we can divide the time spent on the second part by the time spent on the first part:

Ratio of time spent on the second part to the first part = (Time spent on the second part) / (Time spent on the first part)

To find the percentage of the total travel time spent on the first part, we can divide the time spent on the first part by the total travel time and multiply by 100:

Percentage of total travel time spent on the first part = (Time spent on the first part) / (Total travel time) * 100

Let's calculate the values using the given information:

Time spent on the first part = 2.8 hours

Time spent on the second part = 1.2 hours

Total travel time = Time spent on the first part + Time spent on the second part

Now we can substitute these values into the formulas to find the answers.

Calculation

Time spent on the first part = 2.8 hours

Time spent on the second part = 1.2 hours

Total travel time = 2.8 hours + 1.2 hours = 4 hours

Ratio of time spent on the second part to the first part = (1.2 hours) / (2.8 hours) = 0.4286

Percentage of total travel time spent on the first part = (2.8 hours) / (4 hours) * 100 = 70%

Answer

The time spent on the second part is approximately 0.4286 times less than the time spent on the first part.

Approximately 70% of the total travel time is spent on the first part.

Please let me know if I can help you with anything else.