Jamila starts from her library and walks 8 km towards the south. She turns left and walks 12 km, and finally turns left again and walks 13 km. How far is Jamila from the library now?
Correct answer A. 13 km
Explanation
Taking the library as the origin, the final position is 12 km east and 5 km north of it. The shortest distance is the square root of (12² + 5²), which is 13 km.
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