Q. 22

The cost of harvesting a square field at RS. 900 per hectare is RS. 8100. Find the cost of putting a fence around it at RS. 18 per metre.

Answer :

Given:


Rate = Rs 900 per hectare


Total Cost = Rs 8100


Rate of fencing = Rs 18 per metre


Let the side of square field be s



Now,




= 9 hectares = 90000 m2


Area = side2


90000 m2 = side2


side = 300 m2


Now,


Perimeter = 4 × side


= 4 × 300 m2


= 1200m2


Therefore,


Cost of fencing = 1200 m2 × Rs 18 per metre


= Rs 21600


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