Question

Маша решила оклеить куб с ребром 4 см красной бумагой. хватит ли ей листа красной бумаги прямоугольной формы, длина которого 2дм 8 см, а ширина 50мм

Answer 1

1). (4•4)•6= 96 см2 площадь куба
2дм 8см = 28см = 280 мм
2). 280•50= 14 000 мм2 = 140 см2 
140>96, значит бумаги хватит

Answer 2

Calculating the Required Red Paper for Masha's Project

To determine if Masha has enough red paper to cover a cube with a 4 cm edge, we need to calculate the surface area of the cube and compare it to the area of the red paper she has.

The formula to calculate the surface area of a cube is: Surface Area = 6 * (side length)^2

Given that the side length of the cube is 4 cm, we can calculate the surface area.

Calculating the Surface Area of the Cube

The surface area of the cube with a 4 cm edge can be calculated as follows: Surface Area = 6 * (4 cm)^2

Conversion of Units

Before proceeding with the calculation, it's important to convert the dimensions of the red paper to the same unit as the side length of the cube, which is centimeters (cm).

- The length of the red paper is 2 dm 8 cm, which can be converted to 28 cm. - The width of the red paper is 50 mm, which can be converted to 5 cm.

Now, we can calculate the surface area of the cube and compare it to the area of the red paper.

Comparison of Surface Area of Cube and Red Paper

The next step is to compare the surface area of the cube with the area of the red paper to determine if Masha has enough red paper to cover the cube.

I will now calculate the surface area of the cube and compare it to the area of the red paper.