A boy walks 12 m north, then 5 m west, then 12 m south. How far is he from his starting point? MCQ with Answer and Explanation

Explanation:
Total turn = +135° (CW) - 90° (CCW) + 45° (CW) - 135° (CCW) = -45° (45° anticlockwise). Starting from South-East, a 45° anticlockwise turn puts her facing East.

Explanation:
Net east = -4+12=8 km, north=3 km. Distance = √(8²+3²)=√(64+9)=√73 ≈ 8.54. Not 13. I'll change: 5 km west, 12 km north, 10 km east -> net east 5, north 12 => √(5²+12²)=13. So question: 5 km west, 12 km north, 10 km east. Shortest distance 13 km. I'll adjust: A man walks 5 km west, then 12 km north, then 10 km east. Shortest distance? 13 km. So I'll replace.

Explanation:
Evening sun west, shadow east. If one's shadow falls to his left, left is east => he faces south. The other faces opposite, i.e., north. So other faces north. Wait, question: 'Which direction is the other facing?' If they face each other, one faces south, other faces north. So answer North. Option A: North.