Question

За три недели отремонтировали 108 км. дороги. За первую неделю отремонтировали 4/9 дороги, за вторую - 11/15 остальной дороги. Сколько километров дороги отремонтировали за третью неделю?

Answer 1

Ответ:

Пошаговое объяснение:

108 * 4/9= 48 км отремонтировали за первую неделю

108 - 48= 60 км осталось отремонтировать

60 * 11/15= 44 км отремонтировали за вторую неделю

108 - 48 - 44= 16 км дороги отремонтировали за третью неделю

Answer 2

Calculation of Road Repair Progress

To determine the number of kilometers of road repaired during the third week, let's first calculate the progress made in the first two weeks.

In the first week, 4/9 of the road was repaired. In the second week, 11/15 of the remaining road was repaired.

To calculate the progress made in the first two weeks, we can use the following formula:

Total progress = (Progress in the first week) + (Progress in the second week)

Let's calculate the progress made in the first two weeks:

Progress in the first week = (4/9) * 108 km Progress in the second week = (11/15) * (5/9) * 108 km

Total progress = Progress in the first week + Progress in the second week

Now, let's calculate the progress made in the third week:

Progress in the third week = Total progress - (Progress in the first week + Progress in the second week)

Calculation:

Progress in the first week = (4/9) * 108 km = 48 kmProgress in the second week = (11/15) * (5/9) * 108 km = 44 km Total progress = 48 km + 44 km = 92 km

Progress in the third week = 108 km - 92 km = 16 km

Therefore, 16 kilometers of road were repaired during the third week.

Please note that the sources provided did not contain specific information about road repairs, so the calculation is based solely on the given information.