Question

A train of length 100m travelling with a speed of 30m/s overtaking another train of length 300m qt a speed of 20m/s in the same direction . The time taken by the first train to pass the second train is _____ a)50s b)10s c)20s d) 40s

Answer 1

Relative Speed of both Trains = 30-20 =10m/s

Relative Distance = 100+300=400m

Total Time Taken = Total Distance/ Total Relative Speed

=400/10

=40 seconds