Question

Find the Time Taken by the Train to Cross the Bridge
A train 100 meters long running at 72 kmph crosses a bridge which is 525 meters long. What time has been taken by the train?

Answer 1

HI !

Length of train = 100 m
Length of bridge = 525 m
Total distance covered = 100 + 525 = 625 m

[ Note : To convert km/hr to m/s , multiply it by 5/18 ]

Speed = 72 km/hr = 72*5/18 = 20 m/s 

Time = Distance/speed
         = 625/20
         = 31.25 sec

Time taken by the train to cross the bridge = 31.25 sec