The length of the bridge, which a train 170 metres long and travelling at 45 km/hr can cross in 30 seconds, is:
Pick one:
A) 205	B) 210	C) 215	D) 250	E) 260
Speed = [45 X 5/18] m/sec = [25/2] m/sec Time = 30 sec Let the length of bridge be x metres. Then, (170 + x)/30 = 25/2 =&gt; 2(170 + x) = 750 =&gt; x = 205 m.   205nswer: Option 205
<result>A</result>
The length of the bridge, which a train 170 metres long and travelling at 45 km/hr can cross in 30 seconds, is: