Arun walks 20 metres towards the North. He then turns left and walks 40 metres. He again turns left and walks 20 metres. Further, he turns right and walks 20 metres. How far is he from his original position?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 60 metres
A left turn moves the facing direction one step anticlockwise (North → West → South) and a right turn one step clockwise (South → West). Track the facing direction after every turn and keep a running total of the distance from the start.
Facing North, 20 m: 20 m north of the start
Turns left, now facing West, 40 m: 20 m north, 40 m west
Turns left, now facing South, 20 m: \(20-20=0\) m north, 40 m west
Turns right, now facing West, 20 m: \(40+20=60\) m west
Arun is 60 metres (due West) from his original position.
