Bushra starts from her school and walks 11 km towards the north. She turns right and walks 4 km, and finally turns right again and walks 8 km. How far is Bushra from the school now?
Correct answer C. 5 km
Explanation
Taking the school as the origin, the final position is 4 km east and 3 km north of it. The shortest distance is the square root of (4² + 3²), which is 5 km.
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