Question

A train 100 m long is moving with a speed of 60 km/h .In what time shall it cross a bridge of 1 km long

Answer 1

the total distance the train has to travel = ( train's length + the bridge's length )
                                                               = 100m+ 1000m
                                                               = 1100
the speed of the train = 60 km / hr = 60 × 5/ 18 = 16.6 m/s
time taken = distance / speed
=> 1100 / 16.6 
= 66.265 seconds ( ans)