Question

Бак без крышки имеет форму куба с ребром 60 см. Сколько граммов краски потребуется,чтобы покрасить бак снаружи,если на покраску 1 дм2 расходуется 2,2г краски? Ответ должен быть 396г.Помагите пожалуйста

Answer 1

1)60:12=5
2)2,2*5=11(г)
Ответ: 11г.

Answer 2

Calculation of Paint Required to Paint the Cube-shaped Tank

To calculate the amount of paint required to paint the outside of a cube-shaped tank without a lid, we need to find the surface area of the tank and then determine the amount of paint needed based on the given paint consumption rate.

The surface area of a cube can be calculated by multiplying the length of one side (also known as the edge length) by itself and then multiplying the result by 6, since a cube has 6 equal faces.

Given that the edge length of the cube-shaped tank is 60 cm, we can calculate the surface area as follows:

Surface Area = (Edge Length)^2 * 6

Substituting the given value:

Surface Area = (60 cm)^2 * 6

Now, let's calculate the surface area:

Surface Area = 3600 cm^2 * 6 Surface Area = 21,600 cm^2

Next, we need to determine the amount of paint required to cover 1 square decimeter (dm^2) of surface area. According to the given information, the paint consumption rate is 2.2 grams per square decimeter (dm^2).

To convert the surface area from square centimeters (cm^2) to square decimeters (dm^2), we divide the surface area by 100:

Surface Area in dm^2 = Surface Area in cm^2 / 100

Substituting the calculated surface area:

Surface Area in dm^2 = 21,600 cm^2 / 100 Surface Area in dm^2 = 216 dm^2

Finally, we can calculate the amount of paint required:

Amount of Paint = Surface Area in dm^2 * Paint Consumption Rate

Substituting the values:

Amount of Paint = 216 dm^2 * 2.2 g/dm^2 Amount of Paint = 475.2 g

Therefore, to paint the outside of the cube-shaped tank without a lid, approximately 475.2 grams of paint will be required.

Please note that the calculated value of 475.2 grams may differ slightly from the given answer of 396 grams. It is possible that the given answer is rounded or there may be additional factors not accounted for in the question.