Jainav is initially facing a certain direction. Then she turns 90° clockwise, after that she turns 180° anticlockwise. Then she turns 135° anticlockwise. She finally turns 180° clockwise. Now she is facing north-east direction. In which direction was Jainav initially facing before turning? MCQ with Answer and Explanation
Jainav is initially facing a certain direction. Then she turns 90° clockwise, after that she turns 180° anticlockwise. Then she turns 135° anticlockwise. She finally turns 180° clockwise. Now she is facing north-east direction. In which direction was Jainav initially facing before turning?
A. West
B. South
C. North-West
D. East
Answer: Option D
Solution (By JKSSB Mock Tests)
Let clockwise turns be positive and anticlockwise be negative. Total turn = +90° - 180° - 135° + 180° = -45° (which means 45° anticlockwise). Her final direction is North-East. If she arrived at North-East after a 45° anticlockwise turn, her initial direction must have been East.
From a certain place Ritu goes 30 km north, then turns right and walks 15 km. After that it turns right and walks 30 km. Tell how far is he from the starting point and what is his direction from there?
Explanation:
Ritu walks 30 km North, 15 km East, and 30 km South. The North and South movements cancel each other out. She is exactly 15 km East of her starting point.
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