The cos of cultivating a square field a the rate of Rs. 135 per hectare is Rs. 1215. The cost of putting a fence it at the rate of 75 paise per metre would be :
Area = `(Total cost)/(Rate) = (1215/135)` hectares = (9 x 10000) sq.m.
`:.` Side of the square = `sqrt(90000)` = 300 m.
perimeter of the field = (300 x 4) = 1200 m.
Cost of fencing = Rs. `(1200 xx 3/4)` = Rs. 900.
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