Mohit was looking for his father. He went 90 meters to the East before turning to his right. He went 20 meters before turning to his right again to look for his father in his uncle's house 30 meters away from this point. His father was not there. From here he went 100 meters to the North before meeting his father in a street. How far away did the son meet his father from the starting point?
The following diagram shows his path:
Using Pythagoras theorem, we can see that his actual displacement is 100m from the starting point to the finishing point.
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