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Area of the plot is 400 × 200 = 80000 m²
cost for tiling is 12 for 100 m²
⇒so for 1 m² the cost of tiling is rs 0.12 
so the cost of tiling  the plot is 80000 × 0.12 = Rs. 9600.
1 5 1
Perimeter of rectangular plot = 2(400+200)
hence total cost is rs. 144 
i am sorry i told the rate of fencing