Rohit walks 30 m straight from his school towards the North. Then he turns left and walks 20 m. He turns left again and walks 10 m. Finally, he turns left and walks 20 m to reach point A. What is the shortest distance between his school and point A?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 20 m
Each turn is taken from the direction Rohit is facing at that moment:
He walks North 30 m
Facing North, a left turn is West: he walks 20 m
Facing West, a left turn is South: he walks 10 m
Facing South, a left turn is East: he walks 20 m to A
The 20 m West and 20 m East cancel each other, so A is on his first path, \(30-10=20\) m North of the school.