A man walks 4 km west, then 3 km south. What is the shortest distance back to the starting point?
Q1. A man walks 4 km west, then 3 km south. What is the shortest distance back to the starting point?
Answer: 5 km
Explanation: Using Pythagoras' theorem: √(4² + 3²) = √(16 + 9) = √25 = 5 km.