A square lawn is 90m long.A fence is to be put around the lawn.If the fence contains four rounds of barbed wire,find the cost of fencing it.The barbed wire costs rupees 40 per metre.
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ANSWER:
Rs. 57600
STEP-BY-STEP EXPLANATION:
Given that a square lawn is 90m long. A fence is to be put around the lawn and the fence contains four rounds of barbed wire. The barbed wire costs rupees 40 per metre.
We need to find out the cost price of fencing it.
Perimeter of square = 4 × side
(where side is 90 m)
Substitute the values,
Perimeter of square lawn = 4 × 90
= 360 m
As the given wire is barbed in four rounds.
So,
Total length of wire required = 4 × Perimeter of square lawn
= 4 × 360
= 1440 m
Total cost of wire = Length of wire × Cost of 1 m of wire
Substitute the values,
= 1440 × 40
= 57600
Therefore, the cost of fencing is Rs. 57600.
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