A classroom is 12 meters long and 6 meters wide. How many pieces do you need if you use the floor tiles with a side length of 3 decimeters to lay the floor of the classroom?

A classroom is 12 meters long and 6 meters wide. How many pieces do you need if you use the floor tiles with a side length of 3 decimeters to lay the floor of the classroom?

12 * 6 / (0.3 ^ 2) = 800 yuan
Good luck!

After sawing a 3 decimeter wide wooden strip from a square board, the remaining area is 108 square decimeters. The area of the wooden strip is______ Square decimeter

Decompose 108 into quality factor. 108 = 2 × 2 × 3 × 3 = 12 × 9. Thus, 9 plus 3 is exactly equal to 12, so the side length of a square board is 12 decimeters. Therefore, the area of the board is 12 × 3 = 36 (square decimeters). So the answer is: 36

After sawing a 3 decimeter wide wooden strip from a square board, the remaining area is 108 square decimeters. The area of the wooden strip is______ Square decimeter

Decompose 108 into quality factor. 108 = 2 × 2 × 3 × 3 = 12 × 9. Thus, 9 plus 3 is exactly equal to 12, so the side length of a square board is 12 decimeters. Therefore, the area of the board is 12 × 3 = 36 (square decimeters). So the answer is: 36

A cuboid wood is 4 meters long, 3 decimeters wide and 3 decimeters high. After sawing it into 2 sections, how many square meters will the surface area increase?
How many square decimeters is the surface area increased?

"The dream of Sunya"
After sawing into two sections, add two sections,
The surface is increased by 3 decimeters × 3 decimeters × 2 = 18 square decimeters = 0.18 square meters
This problem is only related to width and height, not to length
Good luck and goodbye

The area of a parallelogram is equal to that of a square. The perimeter of the square is 60m, the height of the parallelogram is 9m, and how many meters is the bottom of the parallelogram?

Side length of square: 60 △ 4 = 15m
Square area is the area of parallelogram: 15 × 15 = 225 square meters
Parallelogram bottom: 225 △ 9 = 25m

Does the area of a parallelogram change when it is drawn into a square with the same perimeter?

The area becomes larger, because the area of a parallelogram is the base times the height, and the square is the side length times the side length. If a parallelogram is pulled into a square, the side length of a square is larger than the height of a parallelogram

There is a rectangle. The ratio of length to width is 7:5. It is known that the circumference of the rectangle is 48CM. What is the area of the rectangle?

48 △ 2 = 24 (CM) 24 × 77 + 5 = 14 (CM) 24 × 57 + 5 = 10 (CM) 14 × 10 = 140 (square cm); answer: the area of this rectangle is 140 square cm

The perimeter of a rectangle is 48CM. The ratio of length to width is 5:3. What is the length and width? What is the area?

Length = 48 ／ 2 ／ (5 + 3) × 5 = 15cm
Width = 15 △ 5 × 3 = 9cm
Area = 15 × 9 = 135 square centimeter
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The perimeter of the rectangle is 48CM, the ratio of length to width is 7:5, what is the area? Use proportion to solve

Let the length of a rectangle be x cm and the width be y cm
2x：(48-2x)=7:5
x=14
14：y=7:5
y=10
14 × 10 = 140 square centimeter

The perimeter of the rectangle is 48CM, the ratio of length and width must be 1:5:3, and the area of the rectangle line is?

Rectangle perimeter = 2 × (length + width)
therefore
Length + width = 48 △ 2 = 24 (CM)
Length = 24 × [5 / (5 + 3)] = 15 (CM)
Width = 24 × [3 / (5 + 3)] = 9 (CM)
Area = length × width = 15 × 9 = 135 (square centimeter)
Answer: rectangle area is 135 square centimeter