The perimeter of a square field is 12 cm more than the

Solution

Let the width of the rectangle = x cm Then, 200% of x = 40 x = 40 × 100/200 = 20 cm Perimeter of the rectangle = 2(length + width) = 2 × (40 + 20) = 120 cm Perimeter of the square = (120 + 12) = 132 cm The sides of the square = 132/4 = 33 cm The area of the square field without street = (33)² sq. cm = 1089 sq. cm The area of the square field with street = (33 + 20)² sq. cm = 2809 sq. cm The area of the street = 2809 – 1089 = 1720 sq. cm The total cost of constructing the street = 1720 × 24 = Rs. 41,280