There is a square lawn with a side length of 40 meters. The side length has been increased by 10 meters and expanded into a larger lawn. How many square meters has the lawn area increased

Lawn area before expansion
40 * 40 = 1600 square meters
After the expansion, the side length is increased by 10 meters, so the side length is 10 meters, and the lawn area is 10 meters
50 * 50 = 2500 square meters
The lawn area has increased
2500-1600 = 900 square meters

RELATED INFORMATIONS

1. When a kettle with a mass of 0.3KG is filled with water, the total mass is 0.8kg, and when it is filled with another liquid, the total mass is 0.7kg, then the density of this liquid is () A. 1.4×103kg/m3B. 0.875×103 kg/m3C. 0.8 kg/m3D. 0.8×103 kg/m3
2. If a regular n prism has 22 faces, and the sum of the lengths of all sides is 100cm, and the side length of the bottom is 5cm, what is the area of one side of the prism?
3. 2(sinx)^2-sinxcosx-(cosx)^2=1 X solution set is required
4. Put a circular scissors together to form an approximate rectangle. The length of the rectangle is 6.28 decimeters. What is the area of the circle? What is the perimeter? Big brother“ Beautiful women? Brother is OK
5. Data x1, X2 The mean of XN is x, the variance is S & # 178, then 2x1 + 3,2x2 + 3 2xn + 3 mean and variance the 2x + 3,4s & # 178 I chose; Did I choose the right question for the final exam today? Don't beat me up
6. The circumference of a rectangular piece of paper is 80cm, and the ratio of length to width is 5:3. If you cut it into the largest square piece of paper, what is the area of the square piece of paper?
7. If the average of a set of data x1, X2, X3,... Xn is 5, then the average of data 3x1 + 5, 3x2 + 5, 3x3 + 5,... 3XN + 5 is 5
8. The classroom is paved with 1800 tiles, 40 cm long, 20 cm wide and 1 cm thick. How many square meters is the area of the classroom
9. 1.6/1 hour = () minutes 2.6.08 cubic meters = () cubic meters () cubic decimeters 3. A cylinder and a cone are of equal height and equal base. The sum of their volumes is 48 cubic centimeters, and the volume of this cone is () cubic centimeters 4. The side area of the cylinder is fixed, and the radius of the bottom is in direct proportion to () 5 ratio: 4.2:3 5cm: 30m Simplification ratio: 192:645.25:356/1:9/1 15 / 8:25 / 12 3T: 150kg Solution equation: 1.5x + 24 = 89 9 / 2 × 3 + 4x = 12 / 11 14 / 3x + 21 / 13X = 28 / 15 To find the ratio, simplify the ratio and solve the equation,
10. 1. When someone bought an article, he paid the salesperson 50 yuan. The salesperson misjudged the decimal point of the price of the article and gave him 46.75 yuan. He said that he found too much. How much is the price of the article? If you add the divisor, divisor, quotient sum and the remainder, the sum is 43, the divisor is (), and the divisor is ()
11. 1、4+75/25-2+1/2= 2、（5/3-1）-（1/3-1/6）+5/10-1= 3、5-（13/6+11/8-17/12）-（2+1/6）= 4、5/12-【（8/5+11/30-8/15）-（17/10-7/20）】= 5、4/3-【3/4-（2/3-2/7）+3/14】+1+1/6-3/2= The first answer is: 11 / 2 The second answer is: 0 The third answer is: 17 / 24 The answer to the fourth question is: 1 / 3 The answer to the fifth question is: 5 / 12
12. The circumference of a rectangular piece of paper is 160cm, and the ratio of length to width is 5:3. If it is cut into the largest square piece of paper, what is the area of the square piece of paper?
13. In a long-distance race, the athletes run 5 kilometers away from the starting point and return to the starting point. The leading athlete runs 320 meters per minute, and the last athlete runs 305 meters per minute. How many points do the two athletes meet after the start? How many meters are there from the return point when they meet?
14. If the perimeter of a parallelogram is equal to 50cm, then the length of each diagonal must be less than () cm
15. On the equation KX & # 178; + (2k-1) x + k-1 = 0 of X, there is only integer root. K is an integer. Find the value of K
16. Given that the two real roots of equation x2 + KX + 6 = 0 are x1, X2, and the two real roots of equation x2-kx + 6 = 0 are X1 + 5, X2 + 5, then the value of K is equal to () A. 5B. -5C. 7D. -7
17. If the equation | X-1 | - KX = 0 has and only has one positive real root, then the value range of real number k is______ ．
18. The root of the quadratic equation of one variable x-4 = 0 is
19. On the quadratic equation (a-6) with one variable of X, the square of x-8x + 9 = 0 has real roots. Find the maximum integer value of A
20. If the equation 5 + m / (X-2) + 1 = 1 / (2-x) about X has no solution, then M=