Question

Надо отремонтировать 120 метров шоссе.Отремонтировано 3/4 этого участка.Сколько метров шоссе осталось отремонтировать? 2)Диванную подушку квадратной формы обшили по краям шнуром.Сколько шнура пошло на каждый край,если всего израсходывали 2 м шнура,в том числе по 5 см на каждый уголок?

Answer 1

задание1

 

сколько уже отремонтировали

120:4*3=90 м

сколько осталось отремонтировать

120-90=30 м

 

задание 2

 

израсходовали на уголки

5*4=20 см

израсходовали на  всю подушку без уголков

200-20=180 см

на каждый край

180:4=45 см

 

Answer 2

Calculation of Remaining Road to be Repaired

To determine the remaining length of the road that needs to be repaired, we can use the information provided.

The total length of the road that needs to be repaired is 120 meters. It is mentioned that 3/4 of this section has already been repaired.

To calculate the remaining length, we can subtract the length that has already been repaired from the total length of the road:

Remaining length of road to be repaired = Total length - Length already repaired

Given that 3/4 of the road has been repaired, we can calculate the length already repaired as follows:

Length already repaired = (3/4) * Total length

Substituting the values, we get:

Length already repaired = (3/4) * 120 meters

Now, let's calculate the length already repaired:

Length already repaired = (3/4) * 120 meters = 90 meters.

To find the remaining length of the road to be repaired, we subtract the length already repaired from the total length:

Remaining length of road to be repaired = Total length - Length already repaired

Substituting the values, we get:

Remaining length of road to be repaired = 120 meters - 90 meters

Calculating this, we find:

Remaining length of road to be repaired = 30 meters

Therefore, there are 30 meters of the road that still need to be repaired.

Calculation of Cord Used for Sofa Cushion

To calculate the amount of cord used for each edge of the square-shaped sofa cushion, we need to consider the total amount of cord used and the length used for each corner.

It is mentioned that a total of 2 meters of cord was used, including 5 cm for each corner.

Since there are four corners on a square-shaped cushion, we can calculate the total length of cord used for the corners as follows:

Total length of cord used for corners = 4 corners * 5 cm per corner

Substituting the values, we get:

Total length of cord used for corners = 4 * 5 cm

Calculating this, we find:

Total length of cord used for corners = 20 cm

To find the length of cord used for each edge, we subtract the length used for the corners from the total length of cord used:

Length of cord used for each edge = Total length of cord used - Total length of cord used for corners

Substituting the values, we get:

Length of cord used for each edge = 2 meters - 20 cm

To perform the calculation, we need to convert the length of cord used for corners from centimeters to meters:

Length of cord used for corners = 20 cm * (1 meter / 100 cm)

Calculating this, we find:

Length of cord used for corners = 0.2 meters

Now, let's calculate the length of cord used for each edge:

Length of cord used for each edge = 2 meters - 0.2 meters

Calculating this, we find:

Length of cord used for each edge = 1.8 meters

Therefore, 1.8 meters of cord were used for each edge of the square-shaped sofa cushion, considering that a total of 2 meters of cord was used, including 5 cm for each corner.