Rs 360 is the cost of cultivation of 1 hectare

So Rs 3260 will be cost for 3240/360=9hectare= 90000sqmeter

Since 1 hectare = 10000sqmeter

So area of square land =90000sqmeter

So length of each side = ✓90000=300m

Its perimeter =4*300=1200m

So the cost of fencing @Rs0.75 will be

=RS.0.75*1200=Rs900.