The length of the bridge, which a train 140 meters long and travelling at 45 km/hr can cross in 30 seconds, is?
Choices.
A) 235	B) 288	C) 245	D) 776	E) 232
Speed = (45 * 5/18) m/sec = (25/2) m/sec. Time = 30 sec. Let the length of bridge be x meters. Then, (140 + X)/30 = 25/2 ==&gt; 2(140 + X) = 750 ==&gt; X   = 235 m.   235nswer:235
<result>A</result>
The length of the bridge, which a train 140 meters long and travelling at 45 km/hr can cross in 30 seconds, is?