13. The length of one side of a square field is 418 m. Find the perimeter of the field. If it is to be fenced with
barbed wire that goes 5 times around it, what length of barbed wire would be needed? If the cost of barbed
wire is * 11.50 per metre, what is the cost of the required barbed wire?
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Answer:
perimeter of field = 418× 4
= 1672m
length of wire required = 1672 × 5
= 8360m
cost of 8360 m barbed wire = 8360 × 11.50
= ₹ 96140
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