Answer:
Rs. 170000
Explanation:
Given data
We are told that it cost 6400 to fence 3.2 meter square
Required
The cost to fence 85 meter square
Hence if it cost
Rs. 6400 to fence 3.2 meter square
Rs. x will fence 85 meter square
cross multiply we have
x= 85*6400/3.2
x=544000/3.2
x= Rs. 170000