A student starts from his house in south direction, then turns to his right, walks 2 km and turns to his left and again turns to his left and walks 2 km. He now takes 450 turns in clockwise direction and reaches his college. In which direction is his college with respect to his house? MCQ with Answer and Explanation
A student starts from his house in south direction, then turns to his right, walks 2 km and turns to his left and again turns to his left and walks 2 km. He now takes 450 turns in clockwise direction and reaches his college. In which direction is his college with respect to his house?
A. North
B. Southeast
C. South
D. Southwest
Answer: Option C
Solution (By JKExamLibrary)
Walks South. Right (West) for 2km. Left (South) then Left (East) for 2km. The 2km West and 2km East cancel out, leaving him directly South of his house. The 450° CW turn (which is one full 360° circle + 90°) only changes the direction he is *facing*, not his geographical position. He remains South of his house.
Explanation:
Total east = 3+12=15, north 4 -> √(15²+4²)=√241 ≈ 15.52, not 13. I'll do 5 east, 12 north -> 13. So: 5 m east, then 12 m north. Shortest distance 13 m. So question: A child walks 5 m east, then 12 m north. Shortest distance? 13 m.
A boy facing east turns to his right and walks 20 metres. Then he turns to his left and walks 15 metres. After this he walks 25 meters while facing west. He then turns to his right and walks 20 metres. At what distance is he now from his initial position?
Explanation:
He turns right (facing South) and walks 20 m. Turns left (facing East) and walks 15 m. Faces West and walks 25 m, making him 10 m West of his starting longitude (15 - 25 = -10). He turns right (North) and walks 20 m, returning to his starting latitude. He is 10 m West of the start.
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