Math
posted by zulfiqar .
Find the cost of erecting a fence around a squar field, whose area is 729 hectares at the rate of Rs.1.50 per metre. (1 hectare=10000m2)

since the area = 729 hectares = 7290000 m^2
the length of the square = 2700 m
so the perimeter is 4 times that, then multiply by 1.5 to get Rs