Two parallel rail tracks run north south. Train A moves north with a speed of 54 km/h and train B moves south with a speed of 90 km/h.
The relative velocity of ground with respect to B is
(a) – 90 km/h
(b) –144 km/h
(c) –70 km/h
(d) –60 km/h
Correct option (a) – 90 km/h
Explanation:
Relative velocity of ground with respect to train B
To train B, the ground appears to move with a speed of 90 km/h along south.
