Ratio between the sides of rectangle = 3: 4
Let the ratio constant be x then,
Length = 3x and breadth = 4x
Area = L x B
7500=3x × 4x=12x^2
7500/12= x^2=625
x=25
Length = 3 x 25 = 75 m, and Breadth = 4 x 25 = 100 m
Perimeter = 2(75 + 100) = 2 x 175 = 350 m
Cost of fencing 1 meter = 25 paise
Cost of fencing 350 m = 350 x 25 = 8750 paise
In rupees: Rs. 87.50