The length of the bridge, which a train 145 metres long and travelling at 45 km/hr can cross in 30 seconds, is:	Choose the correct choice from the following answers.
A) 200 m
B) 230 m
C) 245 m
D) 250 m
E) 270 m
Let the length of the bridge:L   The equation now is L+145/12.5m/s(45km/hr or12.5m/s)=30   Solving, L =230m   ANSWER:230 m
<result>B</result>
The length of the bridge, which a train 145 metres long and travelling at 45 km/hr can cross in 30 seconds, is: