A train 360 m long is running at a speed of 45 km | hr. In what time will it pass a bridge 140 m long?

30 sec

35 sec

40 sec

45 sec

50 sec

Speed=45×518m/sec=252m/sec Total distance to be covered= 360+140)m=500mFormulaforfindingTime=Distance Speed∴Required time=(500×225)sec=40sec.