W started walking straight from her office to go her home. During her journey she turned 9 times right and 8 times left. She is finally walking towards south to reach her home. In which direction she started walking?
Show answer & explanation
Correct answer: D
Explanation
Total Right Turns: 9
Total Left Turns: 8
Final Direction: South
Effective Turn = Right Turn - Left Turn
= 9 (Right) – 8 (Left) = 1 (Right)
After turning right (90°) once from the starting direction, she is
heading south.
Initial Direction:
Since the final direction is back to the starting direction, we
reverse the effective turn.
If she finally turned right once and reached south, then at the
beginning she was heading left once from south.
A 90° left turn from south leads to east.