Answer:
Walks east 10 paces
Step-by-step explanation:
If we only consider the person's movement along the East-West axis, this movement was:
walks east 20 paces, walks west 25 paces and walks east 15 paces.
Taking east as positive and west as negative, this is equivalent to +20 -25 +15 = 10, or walks east 10 paces
Considering the person's movement along the North-South axis, this movement was:
walks north 10 paces and walks south 10 paces
which cancel out each other.
