Q2.A farmer wants to fence his square field of side 10 metres .It takes him 1minute for one
round. Find his displacement at the end of 170 seconds.
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Given : farmer wants to fence his square field of side 10 metres .
It takes him 1 minute for one round.
To Find : his displacement at the end of 170 seconds.
Solution:
1 minute = 60 secs
60 secs completes 0ne round
170 secs = 60 + 60 + 50
= 60 + 60 + (60 - 10)
hence 2 complete round and 10 secs away from completing 3rd round
Perimeter of field = 4 x 10 - 40 m
Distance covered in 60 sec = 40 m
Distance to be covered in 10 sec = 40 x 10/60
= 20/3 m
So He is 20/3 m from start
so displacement = 20/3 m
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