Rashi walks 20 metres in front and 20 metres to the right. Then, every time turning to her left, she walks 10, 30 and 30 metres respectively. How far is she now from her starting point?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 10 metres
Take her first direction (“in front”) as North and track the direction she faces after every turn:
20 m North, then a right turn: she faces East and walks 20 m
Facing East, a left turn: she faces North and walks 10 m
Facing North, a left turn: she faces West and walks 30 m
Facing West, a left turn: she faces South and walks 30 m
North–south: she went 20 + 10 = 30 m North and then 30 m South, so she is back on the starting line. East–west: 20 m East and 30 m West leave her 10 m West of the start.
