A man walks east with certain velocity. A car is travelling along a road which is `30^(@)` West of North. While a bus is travelling in another road which is `60^(@)`South of West. Find the angle between velocity vector of (a) man and car (b) car and bus ( c) bus and man.

Explanation

From the diagram the angle between velocity vector of man and car is `90^(@)+30^(@)=120^(@)`
The angle between velocity vector of car and bus is `60^(@)+60^(@)=120^(@)`
The angle between velocity of bus and man is `30^(@)+90^(@)=120^(@)`