A girl walks 25 km north, then 16 km east, and finally 9 km south. What is her distance from the starting point?
Q1. A girl walks 25 km north, then 16 km east, and finally 9 km south. What is her distance from the starting point?
Answer: √(16² + 16²) km
Explanation: The girl is (25 - 9) = 16 km north and 16 km east, so distance = √(16² + 16²).