A girl walks 20 metres towards North. Then, turning to her left, she walks 50 metres. Then, turning to her right, she walks 40 metres. Again, she turns to her right and walks 50 metres. How far is she from her initial position?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 60 metres
Each turn is taken from the direction she is facing at that moment:
Facing North, a left turn is West
Facing West, a right turn is North
Facing North, a right turn is East
The two 50 m walks, West and then East, cancel each other, so she ends \(20+40=60\) m North of the start.