A girl walk 12m northwards,5m eastwards and 7m southwards,Her displacement is

Answer 1

final displacement is 5N,5E
Now just use the Pythagorean Theorem for the distance.

Answer 2

Disp. = 12i + 5 -7i = 5 + 5i. = 7.07m[45o]

Answer 3

Explain better

Answer 4

the answer is correct but I need the easy working