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As shown in the figure: to build a road with the same width on a rectangular green space with a length of 100 m and a width of 90 m, and the total area of six green spaces is 8448 m2, the width of the road is___ ．
Let the width of the road be XM, according to the equation of the meaning of the problem, we can get ｛ (100-2x) (90-x) = 8448, we can get x2-140x + 276 = 0, we can get X1 = 2, X2 = 138 (not practical, omit); so the answer is 2m
As shown in the figure: to build a road with the same width on a rectangular green space with a length of 100 m and a width of 90 m, and the total area of six green spaces is 8448 m2, the width of the road is___ ．
Let the width of the road be XM, according to the equation of the meaning of the problem, we can get ｛ (100-2x) (90-x) = 8448, we can get x2-140x + 276 = 0, we can get X1 = 2, X2 = 138 (not practical, omit); so the answer is 2m
As shown in the figure, a rectangular grassland is 18 meters long and 12 meters wide. Two crossed paths are built in the middle: one is a parallelogram and the other is a rectangle. Calculate the actual area of the grassland
18 × 12 - 3 × 12 - 3 × 18 + 3 × 3 = 216 - 36 - 54 + 9 = 135 square meters a: the area of grassland is 135 square meters
A road of the same width is built on the rectangular ground with a width of 20m and a length of 30m, and the rest is planted with lawn. If the lawn area is 540M ^ 2, the road can be calculated
Let the road width XM, then the length of the ground is (30-x) m and the width is (20-x) M. therefore, according to the meaning of the problem, the equation (30-x) * (20-x) = 540 is obtained, and the value of X is solved
RELATED INFORMATIONS
- 1. To build the same width Road on the rectangular ground with the width of 20m and the length of 30m, the remaining part of the lawn should be planted to make the lawn area 504cm square, how many meters is the width of the road
- 2. As shown in the picture is a rectangular grassland, 16 meters long and 12 meters wide, with a road 2 meters wide in the middle. Calculate the area of grassland (shadow part)
- 3. The area of a rectangular grassland is 100 square meters. After reconstruction, the length of the grassland will increase to three times of the original. What is the area of the grassland after reconstruction
- 4. If a rectangular lawn is 8 times longer and 2 times wider, its area is 256 square meters. How many meters is the original area of this lawn?
- 5. When the length of a rectangle increases by 2 cm and the width by 5 cm, it becomes a square, and the area increases by 60 square cm. What is the area of the original rectangle? Come on, now! thank you!!!!!!!!!
- 6. A rectangle is divided into four small rectangles, three of which are 24 square centimeter, 30 square centimeter and 32 square centimeter respectively Find the area of the shadow rectangle Make the formula simple
- 7. If the length and width of a rectangle are increased by 4 meters, the area of the rectangle will be increased by 60 square meters. How many meters is the perimeter of the original rectangle
- 8. The length of the rectangle is increased to 56 meters, but the width remains unchanged. What is the area after expansion? The original length is 28 meters, and the area is 252 square meters
- 9. A rectangle has an area of 378 square meters and a width of 9 meters. If the width is increased to 15 meters and the length remains unchanged, the expanded area will be 9 meters
- 10. If the length of a rectangle is reduced by 5 cm, the area will be reduced by 50 square cm. If the width is increased by 7 cm, the area will be increased by 28 square cm
- 11. A rectangular grassland is 16 meters long and 10 meters wide, with a stone road 2 meters wide paved in the middle. How large is the area of grassland? Horizontal shop
- 12. A circular flower bed is to be built in the center of a park. The area of the flower bed is 800 square meters. Xiao Fen estimated that its radius is about () (the error is not less than 1m) A circular flower bed is to be built in the center of a park. The area of the flower bed is 800 square meters. Xiao Fen estimated that its radius is about () (the error is not less than 1m)
- 13. 8 / 7m is 2 / 1m longer than a few parts
- 14. On a rectangular grassland, there is a curved asphalt path (the shaded part in the picture indicates the path, and the horizontal width of the path anywhere is 2 length units). Please guess the area of the grassland? Write the formula and the answer
- 15. As shown in the picture, on a rectangular grassland 80 meters long and 40 meters wide, there is a curved stone path to calculate the area of grassland (the horizontal width of the path is 1 meter anywhere)
- 16. If a 1m wide straight path is built on a lawn with length of AM and width of BM, the area of the remaining lawn can be expressed as______ M2; now in order to increase the aesthetic feeling, the path is changed into a curved path with a width of 1m (as shown in the figure), and the remaining lawn area is______ m2．
- 17. As shown in the figure, a rectangular lawn is 20 meters long and 14 meters wide, with a zigzag path 2 meters wide in the middle
- 18. There is a rectangular lawn, which is 15 meters long and 9 meters wide. There is a 2 meter wide path in the middle. How about the area of the lawn?
- 19. There is a rectangular grassland in a residential area (as shown in the figure), 18 meters long and 10 meters wide, with two even paths in the middle. The actual area of grassland is calculated
- 20. A 55 meter long and 45 meter wide rectangular green space is built with two mutually vertical paths of the same width in the middle, and the rest can be used for greening, with an area of 2000 square meters