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.
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?
Explanation:
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.
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