Facing the east R walks straight 4 km, turns left and walks 3 km and again turns left and walks 4 km. How far is R now from the starting point?
[amp_mcq option1=”2 km” option2=”3 km” option3=”10 km” option4=”11 km” correct=”option2″]
This question was previously asked in
UPSC CAPF – 2012
1. Walks straight 4 km facing East: Moves to (4, 0).
2. Turns left and walks 3 km: Turning left from East is North. Moves 3 km North from (4, 0), reaching (4, 3).
3. Again turns left and walks 4 km: Turning left from North is West. Moves 4 km West from (4, 3), reaching (4-4, 3) = (0, 3).
The final position is (0, 3) and the starting position is (0, 0). The distance between these points is the y-coordinate, which is 3 km.