Consider east as positive 
-axis, north as positive 
-axis. A girl walks 20 m east first time, then 20 m in a direction 
west of north for the second time and then third time in unknown direction and magnitude so as to return to her initial position. What is her third displacement in unit vector notation?
A
B
C
D
She cannot return
Text Solution
Verified by ExpertsThe correct answer is:
A
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