A man walk 10 m towards east, then 40 m towards North and in the last 30 m towards west find the net displacement :-

A man walk 10 m towards east, then 40 m towards North and in the last 30 m towards west find the net displacement :-
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A man walk 10 m towards east, then 40 m towards North and in the last 30 m towards west find the net displacement : ... 5 m` C. 30 m D. `30 sqrt 5 m`
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