A person walks 10 m towards north, then turns right and walks 9 m, then turns right and walks 25 m, then turns left and walks 16 m. What is the shortest distance from the starting point?

10 m
15 m
20 m
25 m

Correct answer: 20 m

Solution

After the movements, the person ends up 20 m away from the starting point. The net displacement can be found by resolving the path into perpendicular components and then calculating the resultant distance.

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