Question

Реши задачу : Сколько надо купить плинтуса для комнаты, длина которой 7 м, ширина 5 м, а ширина дверного проема 1 м

Answer 1

7+7+5+5=24-периметр
24-1=23-метри треба купити

Answer 2

Calculating the Amount of Skirting Boards Needed

To calculate the amount of skirting boards needed for the room, we can start by finding the perimeter of the room and then subtracting the width of the door.

Step 1: Calculate the Perimeter of the Room The perimeter of the room can be calculated using the formula: \[ P = 2 \times (length + width) \]

Given: - Length of the room = 7 m - Width of the room = 5 m

\[ P = 2 \times (7 + 5) = 2 \times 12 = 24 \, m \]

Step 2: Subtract the Width of the Door Given: - Width of the door = 1 m

\[ P - \text{Width of the door} = 24 - 1 = 23 \, m \]

So, the total length of skirting boards needed for the room is 23 meters.

Conclusion

To cover the perimeter of the room, you would need to buy 23 meters of skirting boards.