Reena drives 10 km towards North, then turns to her right to travel 20 km. She again turns right and moves 7 km before traveling 15 km to her right. From that point she takes a left turn and goes on for 3 km and ends the journey. What is the distance between the starting point and the end point?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 5 km
Each turn is taken from the direction she is facing at that moment:
She drives North 10 km; facing North, a right turn is East: 20 km
Facing East, a right turn is South: 7 km
Facing South, a right turn is West: 15 km
Facing West, a left turn is South: 3 km
Where she ends:
North-South: 10 km North, then \(7+3=10\) km South, so she is back on the starting level
East-West: 20 km East, then 15 km West, so she ends \(20-15=5\) km East of the start