The total cost of fencing = Rs 4480
Rate of fencing per metre = Rs 35
Perimeter of the field =Total costRate per metre
=448035=128 m
Let the length of each side of the field be x metres.
Perimeter =(4x) metres
∴4x=128
⇒x=1284=32
Hence, the length of each side of the field is 32 m.