Question

a boy moves 400 m towards north 300 m towards west and again 400 m towards south calculate the displacement of boy from the initial position

Answer 1

Actually, 300m due west is the net displacement of boy taken from initial position. In general, he moves 400 m towards north and initially then 400m towards south finally.

This begins to consider his resultant displacement along north south direction as zero value. Therefore, the displacement of boy is 300m towards west side.

Answer 2

300 m because it's forming a rectangle and it rectangle opposite sides are same so. we have 300m in West it's opposite side is initial to final position so the ans is 300m