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There is a flower bed 25 meters long and 20 meters wide. If a 3 meter wide path is built around the flower bed (as shown in the figure), what is the area of the path?
(25 + 3 + 3) × (20 + 3 + 3) - 25 × 20, = 31 × 26-500, = 806-500, = 306 (square meters). A: the area of the path is 306 square meters
The four walls of a toilet are pasted with ceramic tiles. It is known that the toilet is 2.5 meters long, 2 meters wide and 4 meters high. Rectangular ceramic tiles with a length of 30 cm and a width of 20 cm are selected
2.5 yuan. How much does it cost to buy ceramic tiles?
First find the surface area of the toilet, and then find the area of a ceramic tile, and finally divide the surface area of the toilet by the area of a ceramic tile, that is, how many bricks are used, and then multiply by 2.5
The length of rectangular floor tile is 30cm and the width is 20cm. How many tiles should be used to lay a square
Lay a 60cm * 60cm square with six pieces
There are 96 rectangular tiles with a length of 30cm and a width of 20cm, which can be inlaid into a square wall. The side length of the square wall is several cm,
Total wall area: 30x20x96 = (57600 square cm)
Side length: 57600cm2, square root = 240cm
RELATED INFORMATIONS
- 1. It is known that the length of rectangular ABCD is 30cm and the width is 20cm. A proper plane rectangular coordinate system is established, and the coordinates of a, B, C and D are obtained first Then the rectangle is made in the rectangular coordinate system ABCD.Thank you
- 2. For a cylindrical pool, the inner wall and bottom of the pool should be inlaid with ceramic tiles. The diameter of the pool bottom is 6 meters, and the pool depth is 1.2 meters. How many square meters is the area inlaid with ceramic tiles?
- 3. For a cylindrical pool, the inner wall and bottom of the pool should be inlaid with ceramic tiles. The diameter of the pool bottom is 8 meters, and the pool depth is 2 meters. How many square meters is the area inlaid with ceramic tiles at most
- 4. As shown in the figure, in the quadrilateral BCDE, angle c = angle, bed = 90 degree, angle B = 60 degree, extend CD, be, get the right triangle ABC The length of BC
- 5. As shown in the figure, in the rectangular coordinate system a (0,1) B (2.0) C (2,1.5) (1) find the area of △ ABC. (2) if there is a point P (a, 1 / 2) in the second quadrant Using the formula containing a to express the area of a quadrilateral abop (3) Under the condition of (2), is there a point P such that the area of the quadrilateral abop is equal to the area of △ ABC? If so, find out the coordinates of point P. if not, explain the reason
- 6. It is known that one right side of a right triangle is 3 meters, and the corresponding angle of this right side is 18 degrees. Find the length of another right side and hypotenuse Is a right triangle, and the right side of the three meters is vertical, that is, how much is the length of a, B and C!
- 7. It is known that one right side of a right triangle is 6, and the corresponding angle of this right side is 18 degrees. Find the length of another right side and hypotenuse The right angle side and the hypotenuse take the smallest value
- 8. If there is a right triangle green space, the length of two right angles is 6 m and 8 m respectively. Now we need to expand the green space into an isosceles triangle, and the expansion part is a right triangle with 8 m as the right angle side. Find the perimeter of the expanded isosceles triangle green space. (Fig. 2, Fig. 3 for standby)
- 9. What is the height of the hypotenuse of a right triangle with right sides 3 and 4 and hypotenuse 5
- 10. The two right sides of a right triangle are 3 and 4, and the hypotenuse is 5. What is the height of the hypotenuse?
- 11. Street Park to build a diameter of 12 meters of circular flower bed, around with tiles paved a 3 meter wide path, each tile area is 0.9 square meters Street Park to build a diameter of 12 meters of circular flower bed, around with tiles paved a 3 meter wide path, the area of each tile is 0.9 square meters, how many tiles to use to lay this path?
- 12. The school has built two cylindrical flower beds. The inner diameter of the flower beds is 3 meters, and the height is 0.8 meters. If the height of the filling soil is 0.5 meters, How many cubic meters of soil are needed for the two flower beds?
- 13. Guangming primary school built a semicircular flower bed along a wall. The fence around the flower bed is 31.4 meters long. How many square meters does the flower bed cover?
- 14. A circular pool with a radius of 6 meters is surrounded by a circular path with a width of 1 meter. How many square meters is the area of this path?
- 15. After adding 3cm to the two adjacent sides of a square, we get a new square. The area of the new square is 39 square centimeters larger than that of the original square. What's the area of the original square?
- 16. The area of a square flower bed is 225 square meters. How many meters is its side length?
- 17. When the side length of a square increases by 3cm, its area increases by 39cm2. The side length of the square is () A. 5cmB. 6cmC. 8cmD. 10cm
- 18. In the middle of a circular grassland with a girth of 25.12 meters and a flower bed with a radius of 2.5 meters, how many square meters of grassland are left?
- 19. In a round flower bed, half a circle, 141.3m, the radius of this flower bed is
- 20. The diameter of a round flower bed is 8m. How many meters is the perimeter of the flower bed and how many square meters does it cover