Two trains are moving in opposite directions on parallel tracks, one with a velocity twice that of the other. If the total length of two trains is 480 ft and they take 3 seconds to cross each other, find their individual velocities.
Let the two trains A and B be moving in the opposite directions with velocities u and 2u respectively.
Relative velocity, V = u + 2u = 3u
Total distance moved = total length of two trains.
i.e. S = 480 ft.
Time taken by trains to cross each other, t = 3 sec
Now, S = Vt
480 = 3u x 3
2u = 106.66 ft/s
u = 53.33ft/s