Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 4 - No. 9)
If a boat travels 10km from a starting point north and then 6km in a southerly direction, what is the boat's final displacement from the starting point?
4 km
16 km
60 km
10 km
解释
The displacement is the difference in distance traveled north and south: 10km - 6km = 4km.