How long does a train 110 meters long running at the speed of 72 km/h take to cross a bridge 132 meters in length?

A 9.8 sec

B 12.1 sec

C 12.42 sec

D 14.3 sec

Correct Answer: Option B

Speed = 72 km/hour = 72*(5/18) m/sec = 20 m/sec Total distance to be covered = 110+132 = 142 meters Time = Distance/Speed