Question

Для школы купили 5 мотков электрического провода,по 56 метров в каждом. Израсходовали две седьмых части всего провода. Сколько метров провода осталось?

Answer 1

1)56 х 5 = 280(м) провода всего
2) 280 :7 х 2 = 80(м) провода израсходовали
3) 280 - 80 = 200(м)
Ответ: 200м провода осталось.

Answer 2

1)5*56=280(м)-провода всего.
2)2/7*280=80(м)-израсходовали.
3)280-80=200(м)-осталось.

Answer 3

Calculation of Remaining Wire Length

To calculate the remaining length of wire, we need to determine the total length of wire purchased and then subtract the length that was used.

Given: - 5 rolls of wire were purchased, with each roll containing 56 meters of wire. - Two-sevenths (2/7) of the total wire was used.

Let's calculate the total length of wire purchased: - Number of rolls: 5 - Length of each roll: 56 meters - Total length of wire purchased: 5 rolls * 56 meters/roll = 280 meters.

Now, let's calculate the length of wire that was used: - Two-sevenths (2/7) of the total wire was used. - Length of wire used: (2/7) * 280 meters = 80 meters.

To find the remaining length of wire, we subtract the length used from the total length purchased: - Remaining length of wire: Total length purchased - Length used = 280 meters - 80 meters = 200 meters.

Therefore, there are 200 meters of wire remaining.