Question

РОЗДІЛ 1 2.25. Потрібно пофарбувати стіни кімнати, довжина якої 4,8 м, ширина 3,5 м, а висота 2,8 м. У кімнаті є вікно розміром 2х1,5 м та двері розміром 0,9х2 м. Щоб пофарбувати 1 м2 стіни, треба 240 г фарби. Скільки кг фарби знадобиться для фарбування стін цієї кімнати? ​

Answer 1

Ответ:

10,0032 кг фарби

Пошаговое объяснение:

Площа, яку треба пофарбувати

S = Sбіч. - Sвікна - Sдверей

S = 2 • (4,8 + 3,5) • 2,8 - 2 • 1,5 - 0,9 • 2 = 46,48 - 3 - 1,8 = 41,68 м2;

m = 41,68 • 0,24 кг = 10,0032 кг

Answer 2

To calculate the amount of paint needed to paint the walls of the room, we need to find the total area of the walls and then determine the amount of paint required per square meter.

Calculating the Total Area of the Walls

The room has a length of 4.8 meters, a width of 3.5 meters, and a height of 2.8 meters. To find the total area of the walls, we need to calculate the perimeter of the room and then multiply it by the height.

The perimeter of the room can be calculated by adding the lengths of all four sides: Perimeter = 2 * (length + width)

Substituting the given values: Perimeter = 2 * (4.8 + 3.5) = 2 * 8.3 = 16.6 meters

Now, we can calculate the total area of the walls by multiplying the perimeter by the height: Total Area of Walls = Perimeter * height

Substituting the given values: Total Area of Walls = 16.6 * 2.8 = 46.48 square meters

Calculating the Amount of Paint Required

Given that 240 grams of paint is needed to paint 1 square meter of the wall, we can calculate the total amount of paint required by multiplying the total area of the walls by the amount of paint required per square meter.

Total Amount of Paint Required = Total Area of Walls * Amount of Paint Required per Square Meter

Substituting the given values: Total Amount of Paint Required = 46.48 * 240 = 11,155.2 grams

To convert grams to kilograms, we divide the total amount of paint required by 1000: Total Amount of Paint Required in Kilograms = 11,155.2 / 1000 = 11.1552 kilograms

Therefore, approximately 11.16 kilograms of paint will be needed to paint the walls of this room.

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