The length of the bridge, which a train 150 metres long and travelling at 45 km/hr can cross in 30 seconds, is:	Choose the most appropriate option.
A) 200 m	B) 225 m	C) 245 m	D) 250 m	E) 270 m
Let the length of the bridge:L   The equation now is L+150/12.5m/s(45km/hr or12.5m/s)=30   Solving, L =225m   ANSWER:225 m
<result>B</result>
The length of the bridge, which a train 150 metres long and travelling at 45 km/hr can cross in 30 seconds, is: