The length of the bridge, which a train 140 metres long and travelling at 45 km/hr can cross in 30 seconds, is:
Answers.
A) 200 m B) 235 m C) 245 m D) 250 m E) 270 m
Let the length of the bridge:L   The equation now is L+140/12.5m/s(45km/hr or12.5m/s)=30   Solving, L =235m   ANSWER:235 m
<result>B</result>
The length of the bridge, which a train 140 metres long and travelling at 45 km/hr can cross in 30 seconds, is: