How long does a train 110 meters long running at a speed of 72 km/hr. take to cross a bridge 132 meters in length?
Given, Length of the train = 110 meter
Length of the bridge = 132 meter
Total Length = (110 + 132) = 242 meter
Speed of the train = 72 km/hr.
= 72 x (5/18) meter/sec. = 20 meter/sec.
Since, Speed of the train = (Length of the train + Length of the bridge)/Time taken to cross the bridge
Therefore, Time taken = (Total Length/Speed of the train)
= (242/20) Sec.
= 12.1 seconds.