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The length and the breadth of a rectangular field are 200 m and 160 m respectively. It is fenced with 2 rounds of a rope. Find the length of the rope. 
1. 720 m
2. 360 m
3. 180 m
4. 1440 m

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Correct Answer - Option 4 : 1440 m

Given:

Length of rectangular field = 200 m

Breadth of rectangular field = 160 m

Formula Used:

Perimeter of rectangle = 2 (Length + breadth)

Calculation:

Perimeter of rectangle = 2 (Length + breadth)

The perimeter of rectangle = Perimeter of the rectangular field

Perimeter of the rectangular field = 2 (200 + 160) 

Perimeter of the rectangular field = 2 × 360 = 720 m

Length of rope needed = 2 × Perimeter of rectangular field

∴ Length of rope needed = 2 × 720 m = 1440 m  

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