Question

Наташа собирается покрасить 6 досок трёхметровой длины ширина одной доски 15 см. какова площадь одной доски ? какова площадь шести досок? какую площадь придётся покрасить наташе если все доски нужно покрасить с обеих сторон?

Answer 1

Пошаговое объяснение:

300×15= 4500см²= 4,5м²-S 1 доски

4,5×6=27м²- S 6 досок

27×2= 54м²- S с обеих сторон

Answer 2

1) 3•15=45см2 - S одной доски
2) 45•6= 270см2 - S шести досок
3) 270•2= 540см2 - S шести досок с двух сторон

Answer 3

Calculating the Area of a Single Board

To find the area of a single board, we can use the formula for the area of a rectangle, which is given by the product of its length and width.

Given: - Length of the board = 3 meters - Width of the board = 15 cm

We need to convert the width to meters to ensure consistent units for the calculation.

1 meter = 100 centimeters

So, the width of the board in meters = 15 cm / 100 = 0.15 meters

Now, we can calculate the area of a single board using the formula: Area = Length * Width

Area = 3 meters * 0.15 meters

Area of a single board = 0.45 square meters

Total Area of Six Boards

To find the total area of six boards, we simply multiply the area of a single board by the number of boards.

Total Area = Area of a single board * Number of boards

Total Area = 0.45 square meters/board * 6 boards

Total Area of six boards = 2.7 square meters

Total Area to be Painted on Both Sides

Since Natasha needs to paint both sides of each board, the total area to be painted will be twice the total area of the boards.

Total Area to be Painted = Total Area of six boards * 2

Total Area to be Painted = 2.7 square meters * 2 = 5.4 square meters

So, Natasha will need to paint a total area of 5.4 square meters if she needs to paint all the boards on both sides.