Answer:
75 m
Explanation:
Here the problem is asking for the distance, not for the displacement.
Distance is a scalar quantity which simply measure the total length of the path covered during a motion, regardless of the direction.
In this problem, the motion of the person consists of two parts:
1) a motion of 45 m (we don't care about the direction)
2) a motion of 30 m
Therefore, the total distance covered is
d = 45 + 30 = 75 m
