Question

Из подготовки к ЕГЭ! Помогите, пожалуйста :) Од­но­го ру­ло­на обоев хва­та­ет для оклей­ки по­ло­сы от пола до по­тол­ка ши­ри­ной 1,6 м. Сколь­ко ру­ло­нов обоев нужно ку­пить для оклей­ки пря­мо­уголь­ной ком­на­ты раз­ме­ра­ми 2,3 м на 4,1 м?

Answer 1

Найдём периметр: (2.3+4.1)*2=12.8
12.8:1.6=8
Ответ: 8 рулонов

Answer 2

Определяем периметр комнаты
2,3 х 2 + 4,1 х 2 = 12,8
Определяем кол-во рулонов
12,8/1,6 = 8 рулонов

Answer 3

Calculation of Wallpaper Rolls Needed

To calculate the number of wallpaper rolls needed to cover a rectangular room, we need to determine the total area of the walls and divide it by the area covered by one roll of wallpaper.

Given: - Width of the wallpaper roll: 1.6 meters - Dimensions of the room: 2.3 meters by 4.1 meters

To find the area of the walls, we need to calculate the perimeter of the room and multiply it by the height of the room (from floor to ceiling).

The perimeter of the room is calculated by adding the lengths of all four sides: Perimeter = 2 * (Length + Width)

For the given room dimensions: Perimeter = 2 * (2.3 + 4.1) = 2 * 6.4 = 12.8 meters

Now, we can calculate the area of the walls: Wall Area = Perimeter * Height

For the given room height (from floor to ceiling) of 1.6 meters: Wall Area = 12.8 * 1.6 = 20.48 square meters

Next, we need to determine the area covered by one roll of wallpaper, which is given as 1.6 meters in width.

Area Covered by One Roll = Width of Roll * Height of Roll

For the given roll dimensions: Area Covered by One Roll = 1.6 * 1 = 1.6 square meters

Finally, we can calculate the number of rolls needed by dividing the total wall area by the area covered by one roll:

Number of Rolls Needed = Wall Area / Area Covered by One Roll

Number of Rolls Needed = 20.48 / 1.6 = 12.8

Since we cannot purchase a fraction of a roll, we need to round up to the nearest whole number. Therefore, 13 rolls of wallpaper are needed to cover the rectangular room with dimensions 2.3 meters by 4.1 meters.

Please note that the calculations provided are based on the given information and assumptions about the dimensions and coverage of the wallpaper rolls. It's always a good idea to consult with a professional or refer to the manufacturer's guidelines for accurate measurements and calculations.