The length of one side of the square is equal to the square root of the area. We will use the long division method to find it as shown below:
∴ Length of one side of the square = 73 m
The circumference of the square is 73 × 4 = 292 m
∴ Total cost of fencing the lawn at Rs. 5 per metre = 292 × 5 = Rs. 1460
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