Question

Две строительные бригады , каждая из которых должна постелить 2240 км железно дорожных путей. первая бригада за неделю постели 16 км, а вторая 14 км. на сколько недель 1 бригада ушла в перед в отличии от второй?

Answer 1

1) 2240/16=140(нед.)-понадобится первой бригаде.

2) 2240/14=160(нед.)-понадобиться второй бригаде.

3) 160-140=20(нед.)- первая бригада опередит другую.

Ответ: 20 недель. 

Answer 2

Calculation of Weeks Taken by the First Brigade

To calculate the number of weeks taken by the first brigade to lay 2240 km of railway tracks, we need to divide the total distance by the distance covered by the brigade in a week.

The first brigade lays 16 km of railway tracks in a week. Therefore, the number of weeks taken by the first brigade can be calculated as:

2240 km / 16 km = 140 weeks.

Calculation of Weeks Taken by the Second Brigade

Similarly, to calculate the number of weeks taken by the second brigade to lay 2240 km of railway tracks, we divide the total distance by the distance covered by the second brigade in a week.

The second brigade lays 14 km of railway tracks in a week. Therefore, the number of weeks taken by the second brigade can be calculated as:

2240 km / 14 km = 160 weeks.

Difference in Weeks Taken

To find the difference in weeks taken by the first brigade compared to the second brigade, we subtract the number of weeks taken by the second brigade from the number of weeks taken by the first brigade.

140 weeks - 160 weeks = -20 weeks.

Therefore, the first brigade took 20 weeks less than the second brigade to complete the task.

Please note that the negative value indicates that the first brigade completed the task 20 weeks earlier than the second brigade.