A girl cycles 8 km east, then 4 km north, then 3 km west. What is the shortest distance from the starting point?
Q1. A girl cycles 8 km east, then 4 km north, then 3 km west. What is the shortest distance from the starting point?
Answer: √(5² + 4²) km
Explanation: Net displacement east is 8 - 3 = 5 km, and north is 4 km, so use Pythagoras' theorem: √(5² + 4²).