Question

У риты есть коробка в форме куба со стороной 120 мм , НО БЕЗ КРЫШКИ . она хочет обклеить снаружи цветной бумагой . сколько листов цветной бумаги площадью 100 см в квадрате потребуется ? )

Answer 1

A-120 мм или 12 см.
1 лист цв.бум.-100см^2, 
тогда 1) a x a=12x12=144см^2 
2) 144x5(крышки нет)=720см^2
3) 720/100=7 20/100 или 7 2/10. 
Ответ: чтобы обклеить коробку снаружи потребуется 7 целых листов и 2/10 листа.

Answer 2

Calculation of the Surface Area of the Cube

To determine the number of sheets of colored paper needed to cover the outside of the cube, we first need to calculate the surface area of the cube. The surface area of a cube can be found by multiplying the length of one side by itself and then multiplying the result by 6, since a cube has 6 equal sides.

Given that the side length of Rita's cube is 120 mm, we can calculate the surface area as follows:

Surface Area = (Side Length)^2 * 6

Surface Area = (120 mm)^2 * 6

Surface Area = 14,400 mm^2 * 6

Surface Area = 86,400 mm^2

Conversion of Square Millimeters to Square Centimeters

The surface area of the cube is currently in square millimeters (mm^2). However, the area of the colored paper is given in square centimeters (cm^2). Therefore, we need to convert the surface area from square millimeters to square centimeters.

To convert square millimeters to square centimeters, we divide the area in square millimeters by 100.

Surface Area (in cm^2) = Surface Area (in mm^2) / 100

Surface Area (in cm^2) = 86,400 mm^2 / 100

Surface Area (in cm^2) = 864 cm^2

Calculation of the Number of Sheets of Colored Paper

Now that we have the surface area of the cube in square centimeters, we can calculate the number of sheets of colored paper needed.

Given that each sheet of colored paper has an area of 100 cm^2, we can divide the surface area of the cube by the area of each sheet to find the number of sheets needed.

Number of Sheets = Surface Area (in cm^2) / Area of Each Sheet (in cm^2)

Number of Sheets = 864 cm^2 / 100 cm^2

Number of Sheets = 8.64

Since we cannot have a fraction of a sheet, Rita will need to round up to the nearest whole number. Therefore, Rita will need 9 sheets of colored paper to cover the outside of the cube.

Please note that the calculations provided are based on the information given and may not account for any additional factors or specific requirements.