a train is moving on a straight track n travels at a speed of72km/hr and passes a pole in 3 seconds. find the time taken by the train to pass the bridge of length of 540 m?

Answer 1

72 km/h = 20 m/s
Use SI units for the calculation.

total time to cross =
(time for engine to cross) + (time for all of train to pass a given point)
= L/V + 3 seconds

L = 540 m

I answered this several days ago. Why are you still posting it?

Answer 2

52.5