CBSE Class 11-science Answered
Let the two trains A and B be moving in opposite directions with with velocities u ans 2u respectively.
Relative velocity V = u + 2u = 3u
Total distance moved = total length of the two trains S = 480 ft.
time taken by the trains to cross each other t = 3 seconds
Now, S = Vt
or, 480 = 3u x 3
or, u = 53.33 ft/s
and 2u = 106.66 ft/s
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