Question

Пол в комнате покрашен дважды.Расход краски на 1м2 в первый раз-120г во второй- 80 г.Сколько потребуется краски ,если комната в длину 5м и в ширину 4м ?Ответ дайте в килограммах.Если можно с краткой записью.Заранее большое спасибо)

Answer 1

S=5*4 м²
m1=5*4*0.12=2.4 кг
m2=5*4*0.08=1.6 кг
всего 2,4+1,6=4 кг

Answer 2

Calculation of Paint Required

To calculate the amount of paint required for the room, we need to find the total area of the walls and then determine the total amount of paint needed based on the given paint consumption rates.

The room has a length of 5 meters and a width of 4 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 of the walls.

The perimeter of the room is calculated by adding the lengths of all four sides: Perimeter = 2 * (Length + Width) = 2 * (5 + 4) = 2 * 9 = 18 meters

Assuming the height of the walls is not given, we'll use a standard height of 2.5 meters for this calculation.

Total area of the walls = Perimeter * Height = 18 * 2.5 = 45 square meters

Now, we can calculate the total amount of paint required by multiplying the total area of the walls by the paint consumption rate for each coat.

The first coat requires 120 grams of paint per square meter, and the second coat requires 80 grams of paint per square meter.

Total paint required = (First coat consumption rate + Second coat consumption rate) * Total area of the walls

Total paint required = (120 g/m² + 80 g/m²) * 45 m²

Let's calculate the total paint required:

Total paint required = (200 g/m²) * 45 m² = 9000 grams

To convert grams to kilograms, we divide by 1000:

Total paint required = 9000 grams / 1000 = 9 kilograms

Therefore, 9 kilograms of paint will be required to paint the room.