The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:

A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train?
A.  45 km/hr 
B.  50 km/hr 
C.  54 km/hr 
D.  55 km/hr 