18. A farmer has a rectangular
field of length and breadth
240 m and 160 m respectively.
He wants to fence it with 3
rounds of rope. What is the
total length of the rope ?
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Step-by-step explanation:
Perimeter = 2(l+b)
= 2(240+180)
= 2(420)
= 840m
The farmer has to cover three times the perimeter of that field.
Therefore, the total length of rope required is thrice its perimeter.
∴, Total length of rope required = 3× 840 m = 2520 m
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