Question

a wire is in the shape of square whose each side is 80m if the same wire is rebent in the shape of a rectangle whose length is 120 M find the area of rectangle also also find the cost of ploughing this rectangular field in the cost of ploughing the field is Rs 5/m square

Answer 1

1) let the rectangle length =l =40cm
breadth =b =22 cm
let the side of a square = a cm
if the same wire is rebent in the shape of a square then
perimeter of a square=perimeter of rectangle
4a=2(l+b)
4a =2(40+22)
4a =2*62
a =2*62/4
a=31 cm
therefore side of a square = a =31cm
2) area of the rectangle =l*b= 40*22=880 cm^2
3)area of the square=a^2 = (31)^2 =961 cm^2
therefore
area of the square is more

Answer 2

Step-by-step explanation:

The perimeter of square = 4*side

4*80=320.

the length of rectangular rebent wire = 120 m.

the breadth = 320m - 120m = 200m.

the area of rectangular wire = l * b

= 120m * 200m = 24000m2

the total cost of ploughing rectangular field is = 2(l+b) = 2(120+200) =240+400=640m.

so, 640m * 5 = Rs. 3200.