A man walks 3 km north, then 4 km east. What is his final direction from the starting point?
Q1. A man walks 3 km north, then 4 km east. What is his final direction from the starting point?
Answer: North-East
Explanation: Use Pythagoras theorem and trigonometry to find the direction. The man is 3 km north and 4 km east, so he is √(3² + 4²) = 5 km away at an angle tan^-1(3/4) north of east.