Question

первый трактор пашет поле за 14ч,второй за 8ч.Кто вспашет больше первый за 7ч или второй за 5ч?

Answer 1

7 часов составляет половину от 14 часов. Следовательно, первый трактор вспашет ровно половину поля за 7 часов.

 

Половина от 8 часов второго трактора, составляет 4 часа. Следовательно, за 5 часов, второй трактор вспашет больше половины поля.

 

первый трактор: 7/14 = 0,5 поля

второй трактор: 5/8  = 0,625 поля

0,5 < 0,625

 

Ответ: Второй трактор вспашет больше за 5 часов, чем первый за 7 часов

Answer 2

Problem Analysis

We are given two tractors, the first one plows a field in 14 hours, and the second one plows the same field in 8 hours. We need to determine which tractor will plow more of the field in 7 hours and which tractor will plow more of the field in 5 hours.

Solution

To solve this problem, we can calculate the fraction of the field each tractor plows in one hour and then multiply it by the given time to find the amount of the field each tractor will plow in the given time.

Let's calculate the fraction of the field each tractor plows in one hour:

- The first tractor plows the field in 14 hours, so it plows 1/14 of the field in one hour. - The second tractor plows the field in 8 hours, so it plows 1/8 of the field in one hour.

Now, let's calculate the amount of the field each tractor will plow in the given time:

- The first tractor will plow 7 * (1/14) = 1/2 of the field in 7 hours. - The second tractor will plow 5 * (1/8) = 5/8 of the field in 5 hours.

Therefore, the first tractor will plow 1/2 of the field in 7 hours, and the second tractor will plow 5/8 of the field in 5 hours.

Answer

The first tractor will plow more of the field in 7 hours, plowing 1/2 of the field. The second tractor will plow more of the field in 5 hours, plowing 5/8 of the field.