Yashi started walking straight towards the East. After walking 55 m, she turns to the left and walks 15 m straight. She then turns to the right and walks 20 m. Again she turns to the right and walks a distance of 15 m. How far is she from the starting point?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 75 m
Each turn is taken from the direction she is facing at that moment:
She walks 55 m facing East
Facing East, a left turn is North: 15 m North
Facing North, a right turn is East: 20 m East
Facing East, a right turn is South: 15 m South
The 15 m North and the 15 m South cancel, so she ends on her starting line, 55 m + 20 m = 75 m East of the start.
