Asked by | 4th Apr, 2015, 12:23: PM
Expert Answer:
Let the initial point of the farmer be point P
The distance covered by the farmer in 40 s is 4 × 10 = 40 m.
The total time given: 2 min and 20 s = (2 × 60) + 20 = 140 s
Since the farmer moves 40 m in 40 s, therefore in 1 s the farmer covers a distance, 
Therefore, the distance covered by the farmer in 140 s is:
140 × 1 m = 140 m.
Thus the number of rotations to cover 140 m along the boundary is:
So, the farmer will be at point R after 140 s.
So the displacement = PR = 
= 14.1 m
Answered by Yashvanti Jain | 13th Dec, 2017, 06:29: PM
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