Fewpal
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Length and breadth of a farmer, field is 240 m and 180 m respectively. He want of fence his field thrice by a rope. What is the total length of rope he must use?

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The farmer has to cover 3 times of perimeter of his field with rope. Therefore, required length of rope will b thrice of perimeter of field. 

Perimeter of field = 2 × (l + b) 

= 2 × (240 m + 180 m) 

= 2 × 420 m = 840 m 

∴ Total length of rope required = 3 × 840 m = 2520 m

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