Gaurav comes out of the back door of his house whose main door is facing north and walks 25m straight, then he turns left and walks 36m, he again turns left and walks 47m. He again turns left and walks 36m. How far and in which direction is he from his house now? MCQ with Answer and Explanation
Gaurav comes out of the back door of his house whose main door is facing north and walks 25m straight, then he turns left and walks 36m, he again turns left and walks 47m. He again turns left and walks 36m. How far and in which direction is he from his house now?
A. 11 m, south
B. 11 m, north
C. 22 m, south
D. 22 m, north
Answer: Option D
Solution (By JKExamLibrary)
Main door faces north, so back door faces south. Path: 25 m south, left (east) 36 m, left (north) 47 m, left (west) 36 m. Net displacement: north 47 - south 25 = 22 m north; east 36 - west 36 = 0. So he is 22 m north of his house.
A person walks 5 km in north-east direction from his place, turns towards south and stops after walking 4 km. At what distance is he from his previous position?
Explanation:
This forms a 3-4-5 right-angled triangle. Walking 5 km North-East implies 3 km East and 4 km North. Walking 4 km South brings him back to the horizontal axis, 3 km East of his starting position.
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