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Explanation:
Given side of square= 10m,Thus
Perimeter P= 40m
Time taken to cover the boundary of 40m = 40s
Thus in 1 second, the farmer covers a distance of 1 m
Now the distance covered by the farmer in 2 min 20sec = 1 × 140 = 140m
Now the total number of rotation the farmer makes to cover a distance of 140m
Total distance/ Perimeter
= 3.5
At this point , the farmer is at a point say B from the origin O
Thus the displacement s= √ (10)^2 + (10)^2 )
From Pythagoras theorem
s = 10√2 = 14.14 m Ans
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