The length of the bridge, which a train 250 metres long and travelling at 72 km/hr can cross in 30 seconds, is:	Options.
A) 200 m B) 225 m C) 245 m D) 350 m E) 240 m
Speed = [72 X 5/18] m/sec = 20 m/sec   Time = 30 sec   Let the length of bridge be x metres.   Then, (250 + x)/30 = 20 =&gt; 250 + x= 600 =&gt; x = 350 m.   ANSWER:350 m
<result>D</result>
The length of the bridge, which a train 250 metres long and travelling at 72 km/hr can cross in 30 seconds, is: