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Nikita walks 2 km towards West, turns right and walks 1 km. She again turns right and walks 2 km, then turns right once more and walks another 2 km. How far is she from her starting point?
A2 km
B1 km
C5 km
D4 km
Answer & Solution
Correct answer: B. 1 km
1. Start at (0,0). Walk West 2 km to (-2, 0).
2. Turn right (now facing North), walk 1 km to (-2, 1).
3. Turn right (now facing East), walk 2 km to (0, 1); turn right (facing South), walk 2 km to (0, -1).
4. Distance from (0,0) to (0,-1) = 1 km.
_Source: RRB Group D CEN-02/2018 PYQ, Q.8._
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