A person walks 30 km in south direction and turns 45 degree clockwise and walks 20 km. Then turns 90 degree anticlockwise and walks 10 km. In which direction is he facing at this time? MCQ with Answer and Explanation
A person walks 30 km in south direction and turns 45 degree clockwise and walks 20 km. Then turns 90 degree anticlockwise and walks 10 km. In which direction is he facing at this time?
A. South
B. Southwest
C. East
D. Southeast
Answer: Option D
Solution (By JKExamLibrary)
Faces South. 45° CW turn = South-West. Then a 90° CCW turn shifts him from South-West directly to South-East.
Explanation:
Total east = 3+12=15 km, north=4 km. Distance = √(15²+4²)=√(225+16)=√241 ≈ 15.52. Not matching. I'll do 3 east, 4 north, 12 east? No. I'll do: 5 km east, 12 km north -> 13. So: A car moves 5 km east, then 12 km north. Shortest distance from start? 13 km. Option A 13 km.
No comments yet. Be the first to start the discussion!