A trainee walks 4 km South and then 3 km East from the same starting point. What is the shortest distance back to the start?
Q1. A trainee walks 4 km South and then 3 km East from the same starting point. What is the shortest distance back to the start?
Answer: 5 km
Explanation: South and East form a right triangle with legs 4 km and 3 km. The hypotenuse is 5 km.